sql 比较两数据库结构的差异

手工比较两数据库结构的差异既费时又费力，下面这段代码能快速地比较两数据库结构的差异，比较内容：
表
字段（类型、是否允许空、标识、字段顺序、默认值、默认值名称、公式、排序规则）
索引（是否主键、是否聚集索引、是否唯一索引、索引名称）
视图
存储过程
触发器
函数
check约束
外键约束（主键表、主键列、级联更新、级联删除、外键名称）

可连接任何数据库运行，只需制定变量@db1、@db2即可

declare @db1 varchar(50),@db2 varchar(50),@collation varchar(100)
select @db1='test',@db2='test1'--name of the database to compare

set @collation='collate Latin1_General_BIN'--collation of the two databases to compare
--Author: pbsql
--Date: 2005-12-22
--Compare database structures:
--exist in one database but not exist in another:
--  1.table, 2.column, 3.index, 4.View, 5.Procedure, 6.Trigger, 7.Function
--  8.Check constraint, 9.Foreign key
--Column:
--  1.data type, 2.allow nulls, 3.identity, 4.order,
--  5.default value, 6.default name, 7.formula, 8.collation
--Index:
--  1.isclustered, 2.isunique, 3.isprimarykey, 4.index name
--Foreign key:
--  1.the referenced table, 2.column of the referenced table,
--  3.cascade update and cascade delete, 4.foreign key name
set nocount on

create table #difference(id int identity(1,1),objecttype varchar(50),
  objectname nvarchar(400),desc_difference nvarchar(3500))
create table #tbname(id int identity(1,1),tbname sysname)

--all user table exist in @db1, and also exist in @db2
exec('
insert #tbname(tbname)
select name
  from '+@db1+'.dbo.sysobjects t
  where xtype=''U''
    and exists(select 1 from '+@db2+'.dbo.sysobjects
               where xtype '+@collation+'=t.xtype '+@collation+'
                 and name '+@collation+'=t.name '+@collation+')
  order by name
')

--objects exist in one database, but not exist in another
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''In '+@db1+', but not in '+@db2+''',
       case when xtype=N''U'' then ''Table''
            when xtype=N''V'' then ''View''
            when xtype=N''P'' then ''Stored Procedure''
            when xtype=N''TR'' then ''Trigger''
            when xtype in(N''FN'',N''IF'',N''TF'') then ''Function''
       end,
       name
  from '+@db1+'.dbo.sysobjects t
  where xtype in(N''U'',N''V'',N''P'',N''TR'',N''FN'',N''IF'',N''TF'')
    and not exists(select 1 from '+@db2+'.dbo.sysobjects
                   where xtype '+@collation+'=t.xtype '+@collation+'
                     and name '+@collation+'=t.name '+@collation+')
union all
select ''In '+@db2+', but not in '+@db1+''',
       case when xtype=N''U'' then ''Table''
            when xtype=N''V'' then ''View''
            when xtype=N''P'' then ''Stored Procedure''
            when xtype=N''TR'' then ''Trigger''
            when xtype in(N''FN'',N''IF'',N''TF'') then ''Function''
       end,
       name
  from '+@db2+'.dbo.sysobjects t
  where xtype in(N''U'',N''V'',N''P'',N''TR'',N''FN'',N''IF'',N''TF'')
    and not exists(select 1 from '+@db1+'.dbo.sysobjects
                   where xtype '+@collation+'=t.xtype '+@collation+'
                     and name '+@collation+'=t.name '+@collation+')
')

--all columns and column property
create table #columns1(id int identity(1,1),tbname sysname,colname sysname,
  xusertype smallint,length smallint,defaultname varchar(100),
  defaulttext nvarchar(1000),colorder smallint,prec smallint,scale int,
  computedformula nvarchar(2000),isnullable int,collation nvarchar(128),
  isidentity int,identseed int,identincr int)
create table #columns2(id int identity(1,1),tbname sysname,colname sysname,
  xusertype smallint,length smallint,defaultname varchar(100),
  defaulttext nvarchar(1000),colorder smallint,prec smallint,scale int,
  computedformula nvarchar(2000),isnullable int,collation nvarchar(128),
  isidentity int,identseed int,identincr int)
exec('
insert #columns1(tbname,colname,xusertype,length,defaultname,defaulttext,
  colorder,prec,scale,computedformula,isnullable,collation,isidentity,
  identseed,identincr)
select a.name,b.name,b.xusertype,b.length,
    (select x.name from '+@db1+'.dbo.sysobjects x,'+@db1+'.dbo.syscolumns y
     where x.id=y.cdefault and y.id=a.id
       and y.name '+@collation+'=b.name '+@collation+'),
    c.[text],b.colorder,isnull(b.prec,0),isnull(b.scale,0),
    d.[text],b.isnullable,b.[collation],
    case b.status when 0x80 then 1 else 0 end,
    ident_seed('''+@db1+'.dbo.'''+'+a.name),
    ident_incr('''+@db1+'.dbo.'''+'+a.name)
  from '+@db1+'.dbo.sysobjects a inner join '+@db1+'.dbo.syscolumns b
      on a.id=b.id
    left join '+@db1+'.dbo.syscomments c
      on b.cdefault=c.id
    left join '+@db1+'.dbo.syscomments d
      on b.id=d.id and b.iscomputed=1
  where a.xtype=''U''
    and exists(select 1 from '+@db2+'.dbo.sysobjects e,
                             '+@db2+'.dbo.syscolumns f
               where e.id=f.id
                 and a.name '+@collation+'=e.name '+@collation+'
                 and b.name '+@collation+'=f.name '+@collation+')
  order by a.name,b.colorder
insert #columns2(tbname,colname,xusertype,length,defaultname,defaulttext,
  colorder,prec,scale,computedformula,isnullable,collation,isidentity,
  identseed,identincr)
select a.name,b.name,b.xusertype,b.length,
    (select x.name from '+@db2+'.dbo.sysobjects x,'+@db2+'.dbo.syscolumns y
     where x.id=y.cdefault and y.id=a.id
       and y.name '+@collation+'=b.name '+@collation+'),
    c.[text],b.colorder,isnull(b.prec,0),isnull(b.scale,0),
    d.[text],b.isnullable,b.[collation],
    case b.status when 0x80 then 1 else 0 end,
    ident_seed('''+@db2+'.dbo.'''+'+a.name),
    ident_incr('''+@db2+'.dbo.'''+'+a.name)
  from '+@db2+'.dbo.sysobjects a inner join '+@db2+'.dbo.syscolumns b
      on a.id=b.id
    left join '+@db2+'.dbo.syscomments c
      on b.cdefault=c.id
    left join '+@db2+'.dbo.syscomments d
      on b.id=d.id and b.iscomputed=1
  where a.xtype=''U''
    and exists(select 1 from '+@db1+'.dbo.sysobjects e,'
                              +@db1+'.dbo.syscolumns f
               where e.id=f.id
                 and a.name '+@collation+'=e.name '+@collation+'
                 and b.name '+@collation+'=f.name '+@collation+')
  order by a.name,b.colorder
')

--column exist in @db1, but not exist in @db2
exec('
insert #difference(desc_difference,objecttype,objectname)
select desc_difference,objecttype,objectname
from
(
select top 100 percent a.name,b.colorder,
    desc_difference=''In '+@db1+'..''+a.name+'', but not in '+@db2+'..''+a.name,
    objecttype=''Column'',
    objectname=b.name
  from '+@db1+'.dbo.sysobjects a,'+@db1+'.dbo.syscolumns b
  where a.xtype=''U''
    and a.id=b.id
    and exists(select 1 from #tbname
               where tbname '+@collation+'=a.name '+@collation+')
    and not exists(select 1 from #columns1
                   where tbname '+@collation+'=a.name '+@collation+'
                     and colname '+@collation+'=b.name '+@collation+')
  order by a.name,b.colorder
) t
')
--column exist in @db2, but not exist in @db1
exec('
insert #difference(desc_difference,objecttype,objectname)
select desc_difference,objecttype,objectname
from
(
select top 100 percent a.name,b.colorder,
    desc_difference=''In '+@db2+'..''+a.name+'', but not in '+@db1+'..''+a.name,
    objecttype=''Column'',
    objectname=b.name
  from '+@db2+'.dbo.sysobjects a,'+@db2+'.dbo.syscolumns b
  where a.xtype=''U''
    and a.id=b.id
    and exists(select 1 from #tbname
               where tbname '+@collation+'=a.name '+@collation+')
    and not exists(select 1 from #columns1
                   where tbname '+@collation+'=a.name '+@collation+'
                     and colname '+@collation+'=b.name '+@collation+')
  order by a.name,b.colorder
) t
')

--column data type is different
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''Data Type: ''+
    t1.name+case when t1.name in (''binary'',''varbinary'',''char'',''varchar'')
                   then ''(''+cast(a.length as varchar(10))+'')''
                 when t1.name in (''nchar'',''nvarchar'')
                   then ''(''+cast(a.length/2 as varchar(10))+'')''
                 when t1.name in (''decimal'',''numeric'')
                   then ''(''+cast(a.prec as varchar(10))+'',''
                       +cast(a.scale as varchar(10))+'')''
                 else ''''
            end+''--''+'''+@db1+'''+'', ''+
    t2.name+case when t2.name in (''binary'',''varbinary'',''char'',''varchar'')
                   then ''(''+cast(b.length as varchar(10))+'')''
                 when t2.name in (''nchar'',''nvarchar'')
                   then ''(''+cast(b.length/2 as varchar(10))+'')''
                 when t2.name in (''decimal'',''numeric'')
                   then ''(''+cast(b.prec as varchar(10))+'',''
                       +cast(b.scale as varchar(10))+'')''
                 else ''''
            end+''--''+'''+@db2+''',
    ''Column'',
    a.tbname+''.''+a.colname
  from #columns1 a inner join #columns2 b
                      on a.tbname '+@collation+'=b.tbname '+@collation+'
                        and a.colname '+@collation+'=b.colname '+@collation+'
                   left join '+@db1+'.dbo.systypes t1
                      on a.xusertype=t1.xusertype
                   left join '+@db2+'.dbo.systypes t2
                      on b.xusertype=t2.xusertype
  where a.xusertype<>b.xusertype or a.length<>b.length
     or a.prec<>b.prec or a.scale<>b.scale
')

--column allow nulls is different
insert #difference(desc_difference,objecttype,objectname)
select 'Allow Nulls: '
       +case a.isnullable when 0 then 'not ' else '' end+'null--'+@db1+', '
       +case b.isnullable when 0 then 'not ' else '' end+'null--'+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.isnullable<>b.isnullable

--column identity is different
insert #difference(desc_difference,objecttype,objectname)
select 'Identity: '
       +case a.isidentity
          when 1 then 'identity('+cast(a.identseed as varchar(10))
                      +','+cast(a.identincr as varchar(10))+')'
          else 'No identity' end
       +'--'+@db1+', '
       +case b.isidentity
          when 1 then 'identity('+cast(b.identseed as varchar(10))
                      +','+cast(b.identincr as varchar(10))+')'
          else 'No identity' end
       +'--'+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.isidentity<>b.isidentity
     or a.identseed<>b.identseed or a.identincr<>b.identincr

--column order is different
insert #difference(desc_difference,objecttype,objectname)
select 'Column Order: '+cast(a.colorder as varchar(10))+'--'+@db1+', '
       +cast(b.colorder as varchar(10))+'--'+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.colorder<>b.colorder

--column default value is different
insert #difference(desc_difference,objecttype,objectname)
select 'Default Value: '+isnull(a.defaulttext,'no default')+' in '+@db1+', '
       +isnull(b.defaulttext,'no default')+' in '+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.defaulttext is not null
    and b.defaulttext is not null
    and a.defaulttext<>b.defaulttext
    or a.defaulttext is not null and b.defaulttext is null
    or a.defaulttext is null and b.defaulttext is not null

--column default name is different
insert #difference(desc_difference,objecttype,objectname)
select 'Default Name: '+isnull(a.defaultname,'no default')+' in '+@db1+', '
       +isnull(b.defaultname,'no default')+' in '+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.defaulttext is not null and b.defaulttext is not null
    and a.defaultname<>b.defaultname

--column formula is different
insert #difference(desc_difference,objecttype,objectname)
select 'Formula: '+isnull(a.computedformula,'no formula')+' in '+@db1+', '
       +isnull(b.computedformula,'no formula')+' in '+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.computedformula is not null
    and b.computedformula is not null
    and a.computedformula<>b.computedformula
    or a.computedformula is not null and b.computedformula is null
    or a.computedformula is null and b.computedformula is not null

--column collation is different
insert #difference(desc_difference,objecttype,objectname)
select 'Collation: '+isnull(a.collation,'no collation')+' in '+@db1+', '
       +isnull(b.collation,'no collation')+' in '+@db2,
    'Column',
    a.tbname+'.'+a.colname
  from #columns1 a inner join #columns2 b
    on a.tbname=b.tbname and a.colname=b.colname
  where a.xusertype=b.xusertype
    and (a.collation is not null
         and b.collation is not null
         and a.collation<>b.collation
         or a.collation is not null and b.collation is null
         or a.collation is null and b.collation is not null)

--Compare index
create table #indexes1(tbname sysname,indexname sysname,colname sysname,
  keyno smallint,isunique int,isclustered int,indexcol nvarchar(1000),
  isprimarykey bit)
create table #indexes2(tbname sysname,indexname sysname,colname sysname,
  keyno smallint,isunique int,isclustered int,indexcol nvarchar(1000),
  isprimarykey bit)
exec('
declare @indexcol nvarchar(1000),@indexname nvarchar(128)
insert #indexes1(tbname,indexname,colname,keyno,
  isunique,isclustered,isprimarykey)
select tbname=c.name,indexname=b.name,colname=d.name,a.keyno,
       isunique=case when exists(select 1 from '+@db1+'.dbo.sysobjects
                                 where (xtype=''UQ'' or xtype=''PK'')
                                   and parent_obj=a.id
                                   and name '+@collation+'=b.name '+@collation+')
                     then 1 else 0 end,
       isclustered=case when b.indid=1 then 1 else 0 end,
       isprimarykey=case when exists(select 1 from '+@db1+'.dbo.sysobjects
                                     where xtype=''PK''
                                       and parent_obj=a.id
                                       and name '+@collation+'=b.name '+@collation+')
                         then 1 else 0 end
  from '+@db1+'.dbo.sysindexkeys a,'+@db1+'.dbo.sysindexes b,'
        +@db1+'.dbo.sysobjects c,'+@db1+'.dbo.syscolumns d
  where a.id=b.id and a.indid=b.indid and a.id=c.id and c.id=d.id
    and a.colid=d.colid and c.xtype=''U''
    and b.name not like ''_WA_Sys_%''
    and exists(select 1 from #tbname
               where tbname '+@collation+'=c.name '+@collation+')
  order by tbname,indexname,keyno
select @indexcol='''',@indexname=''''
update #indexes1
  set @indexcol=case when @indexname<>indexname
                     then colname else @indexcol+''+''+colname end,
      indexcol=@indexcol,
      @indexname=indexname
delete from #indexes1
  where exists(select 1 from #indexes1 t
               where #indexes1.tbname=t.tbname
                 and #indexes1.indexname=t.indexname
                 and #indexes1.keyno<t.keyno)
')
exec('
declare @indexcol nvarchar(1000),@indexname nvarchar(128)
insert #indexes2(tbname,indexname,colname,keyno,
  isunique,isclustered,isprimarykey)
select tbname=c.name,indexname=b.name,colname=d.name,a.keyno,
       isunique=case when exists(select 1 from '+@db2+'.dbo.sysobjects
                                 where (xtype=''UQ'' or xtype=''PK'')
                                   and parent_obj=a.id
                                   and name '+@collation+'=b.name '+@collation+')
                     then 1 else 0 end,
       isclustered=case when b.indid=1 then 1 else 0 end,
       isprimarykey=case when exists(select 1 from '+@db2+'.dbo.sysobjects
                                     where xtype=''PK''
                                       and parent_obj=a.id
                                       and name '+@collation+'=b.name '+@collation+')
                         then 1 else 0 end
  from '+@db2+'.dbo.sysindexkeys a,'+@db2+'.dbo.sysindexes b,'
        +@db2+'.dbo.sysobjects c,'+@db2+'.dbo.syscolumns d
  where a.id=b.id and a.indid=b.indid and a.id=c.id and c.id=d.id
    and a.colid=d.colid and c.xtype=''U''
    and b.name not like ''_WA_Sys_%''
    and exists(select 1 from #tbname
               where tbname '+@collation+'=c.name '+@collation+')
  order by tbname,indexname,keyno
select @indexcol='''',@indexname=''''
update #indexes2
  set @indexcol=case when @indexname<>indexname
                     then colname else @indexcol+''+''+colname end,
      indexcol=@indexcol,
      @indexname=indexname
delete from #indexes2
  where exists(select 1 from #indexes2 t
               where #indexes2.tbname=t.tbname
                 and #indexes2.indexname=t.indexname
                 and #indexes2.keyno<t.keyno)
')
--index exist in @db1, but not exist in @db2
insert #difference(desc_difference,objecttype,objectname)
select 'In '+@db1+', but not in '+@db2,
    'Index',
    'Index on '+tbname+'('+indexcol+')'
  from #indexes1 t
  where not exists(select 1 from #indexes2
                   where tbname=t.tbname and indexcol=t.indexcol)
--index exist in @db2, but not exist in @db1
insert #difference(desc_difference,objecttype,objectname)
select 'In '+@db2+', but not in '+@db1,
    'Index',
    'Index on '+tbname+'('+indexcol+')'
  from #indexes2 t
  where not exists(select 1 from #indexes1
                   where tbname=t.tbname and indexcol=t.indexcol)
--index is different on isclustered
insert #difference(desc_difference,objecttype,objectname)
select case a.isclustered when 1 then 'Clustered' else 'Not clustered' end
       +'--'+@db1+', '
       +case b.isclustered when 1 then 'Clustered' else 'Not clustered' end
       +'--'+@db2,
    'Index',
    'Index on '+a.tbname+'('+a.indexcol+')'
  from #indexes1 a,#indexes2 b
  where a.tbname=b.tbname
    and a.indexcol=b.indexcol
    and a.isclustered<>b.isclustered
--index is different on isunique
insert #difference(desc_difference,objecttype,objectname)
select case a.isunique when 1 then 'Unique' else 'Not unique' end+'--'+@db1+', '
       +case b.isunique when 1 then 'Unique' else 'Not unique' end+'--'+@db2,
    'Index',
    'Index on '+a.tbname+'('+a.indexcol+')'
  from #indexes1 a,#indexes2 b
  where a.tbname=b.tbname and a.indexcol=b.indexcol and a.isunique<>b.isunique
--index is different on isprimarykey
insert #difference(desc_difference,objecttype,objectname)
select case a.isprimarykey when 1 then 'Primary key' else 'Not primary key' end
       +'--'+@db1+', '
       +case b.isprimarykey when 1 then 'Primary key' else 'Not primary key' end
       +'--'+@db2,
    'Index',
    'Index on '+a.tbname+'('+a.indexcol+')'
  from #indexes1 a,#indexes2 b
  where a.tbname=b.tbname
    and a.indexcol=b.indexcol
    and a.isprimarykey<>b.isprimarykey
--index name is different
insert #difference(desc_difference,objecttype,objectname)
select 'Index name is different: '+a.indexname+'--'+@db1+', '
       +b.indexname+'--'+@db2,
    'Index',
    'Index on '+a.tbname+'('+a.indexcol+')'
  from #indexes1 a,#indexes2 b
  where a.tbname=b.tbname and a.indexcol=b.indexcol and a.indexname<>b.indexname

--Check exist in @db1, but not exist in @db2
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''In '+@db1+', but not in '+@db2+''',''Check'',name
  from '+@db1+'.dbo.sysobjects t
  where xtype=''C''
    and not exists(select 1 from '+@db2+'.dbo.sysobjects
                   where xtype=''C'' and name '+@collation+'=t.name '+@collation+')
')
--Check exist in @db2, but not exist in @db1
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''In '+@db2+', but not in '+@db1+''',''Check'',name
  from '+@db2+'.dbo.sysobjects t
  where xtype=''C''
    and not exists(select 1 from '+@db1+'.dbo.sysobjects
                   where xtype=''C'' and name '+@collation+'=t.name '+@collation+')
')

--Compare check constraints
create table #check1(tbname sysname,checkname sysname,checktext nvarchar(3500))
create table #check2(tbname sysname,checkname sysname,checktext nvarchar(3500))
exec('
insert #check1(tbname,checkname,checktext)
select tbname=b.name,checkname=a.name,checktext=c.[text]
  from '+@db1+'.dbo.sysobjects a,'
        +@db1+'.dbo.sysobjects b,'
        +@db1+'.dbo.syscomments c
  where a.xtype=''C'' and a.id=c.id and b.id=a.parent_obj
    and exists(select 1 from '+@db2+'.dbo.sysobjects
               where xtype=''C'' and name '+@collation+'=a.name '+@collation+')
')
exec('
insert #check2(tbname,checkname,checktext)
select tbname=b.name,checkname=a.name,checktext=c.[text]
  from '+@db2+'.dbo.sysobjects a,'
        +@db2+'.dbo.sysobjects b,'
        +@db2+'.dbo.syscomments c
  where a.xtype=''C'' and a.id=c.id and b.id=a.parent_obj
    and exists(select 1 from '+@db1+'.dbo.sysobjects
               where xtype=''C'' and name '+@collation+'=a.name '+@collation+')
')
--Check constraint text is different
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''Check ''+a.checkname+'' on table ''+a.tbname+'' is different'',
       ''Check'',
       a.checkname
  from #check1 a,#check2 b
  where a.tbname=b.tbname and a.checkname=b.checkname
    and a.checktext<>b.checktext
')

--Compare foreign key constraint
create table #fk1(fkname sysname,fktbname sysname,pktbname sysname,
  fkcolumns nvarchar(1800),pkcolumns nvarchar(1800),
  cascade_update bit,cascade_delete bit)
create table #fk2(fkname sysname,fktbname sysname,pktbname sysname,
  fkcolumns nvarchar(1800),pkcolumns nvarchar(1800),
  cascade_update bit,cascade_delete bit)
exec('
insert #fk1(fkname,fktbname,pktbname,fkcolumns,pkcolumns,cascade_update,cascade_delete)
select fkname=b.name,
       fktbname=c.name,
       pktbname=d.name,
       fkcolumns=isnull((select name from '+@db1+'.dbo.syscolumns
                         where id=c.id and colid=a.fkey1),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey2),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey3),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey4),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey5),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey6),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey7),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey8),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey9),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey10),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey11),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey12),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey13),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey14),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey15),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey16),''''),
       pkcolumns=isnull((select name from '+@db1+'.dbo.syscolumns
                         where id=d.id and colid=a.rkey1),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey2),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey3),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey4),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey5),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey6),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey7),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey8),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey9),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey10),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey11),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey12),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey13),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey14),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey15),'''')
         +isnull((select '',''+name from '+@db1+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey16),''''),
       cascade_update=(b.status/8192)%2,
       cascade_delete=(b.status/4096)%2
  from '+@db1+'.dbo.sysreferences a,'+@db1+'.dbo.sysobjects b,'
        +@db1+'.dbo.sysobjects c,'+@db1+'.dbo.sysobjects d
  where b.parent_obj in(select id from '+@db1+'.dbo.sysobjects
                        where xtype=''U'')
  and a.constid=b.id
  and a.fkeyid=c.id
  and a.rkeyid=d.id
  and c.name '+@collation+' in(select tbname from #tbname)
')
exec('
insert #fk2(fkname,fktbname,pktbname,fkcolumns,pkcolumns,cascade_update,cascade_delete)
select fkname=b.name,
       fktbname=c.name,
       pktbname=d.name,
       fkcolumns=isnull((select name from '+@db2+'.dbo.syscolumns
                         where id=c.id and colid=a.fkey1),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey2),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey3),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey4),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey5),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey6),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey7),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey8),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey9),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey10),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey11),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey12),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey13),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey14),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey15),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=c.id and colid=a.fkey16),''''),
       pkcolumns=isnull((select name from '+@db2+'.dbo.syscolumns
                         where id=d.id and colid=a.rkey1),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey2),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey3),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey4),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey5),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey6),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey7),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey8),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey9),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey10),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey11),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey12),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey13),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey14),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey15),'''')
         +isnull((select '',''+name from '+@db2+'.dbo.syscolumns
                  where id=d.id and colid=a.rkey16),''''),
       cascade_update=(b.status/8192)%2,
       cascade_delete=(b.status/4096)%2
  from '+@db2+'.dbo.sysreferences a,'+@db2+'.dbo.sysobjects b,'
        +@db2+'.dbo.sysobjects c,'+@db2+'.dbo.sysobjects d
  where b.parent_obj in (select id from '+@db2+'.dbo.sysobjects
                         where xtype=''U'')
  and a.constid=b.id
  and a.fkeyid=c.id
  and a.rkeyid=d.id
  and c.name '+@collation+' in(select tbname from #tbname)
')
--exist in @db1, but not exist in @db2
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''In '+@db1+', but not in '+@db2+''',
       ''Foreign key'',
       ''Foreign key on ''+a.fktbname+''(''+fkcolumns+'')''
  from #fk1 a
  where not exists(select 1 from #fk2 b
                   where a.fktbname=b.fktbname and a.fkcolumns=b.fkcolumns)
')
--exist in @db2, but not exist in @db1
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''In '+@db2+', but not in '+@db1+''',
       ''Foreign key'',
       ''Foreign key on ''+a.fktbname+''(''+fkcolumns+'')''
  from #fk2 a
  where not exists(select 1 from #fk1 b
                   where a.fktbname=b.fktbname and a.fkcolumns=b.fkcolumns)
')
--the referenced table or column is different
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''The referenced table or column is different: ''
       +a.pktbname+''(''+a.pkcolumns+'')--' +@db1+', ''+b.pktbname
       +''(''+b.pkcolumns+'')--' +@db2+''',
       ''Foreign key'',
       ''Foreign key on ''+a.fktbname+''(''+a.fkcolumns+'')''
  from #fk1 a,#fk2 b
  where a.fktbname=b.fktbname and a.fkcolumns=b.fkcolumns
    and (a.pktbname<>b.pktbname or a.pkcolumns<>b.pkcolumns)
')
--the cascade update rule is different
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''The cascade update rule is different: ''
       +case a.cascade_update when 1 then ''Cascade Update''
                              else ''No Action'' end
       +''--' +@db1+', ''
       +case b.cascade_update when 1 then ''Cascade Update''
                              else ''No Action'' end
       +''--' +@db2+''',
       ''Foreign key'',
       ''Foreign key on ''+a.fktbname+''(''+a.fkcolumns+'')''
  from #fk1 a,#fk2 b
  where a.fktbname=b.fktbname and a.fkcolumns=b.fkcolumns
    and a.pktbname=b.pktbname and a.pkcolumns=b.pkcolumns
    and a.cascade_update<>b.cascade_update
')
--the cascade delete rule is different
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''The cascade delete rule is different: ''
       +case a.cascade_delete when 1 then ''Cascade Delete''
                                     else ''No Action'' end
       +''--' +@db1+', ''
       +case b.cascade_delete when 1 then ''Cascade Delete''
                                     else ''No Action'' end
       +''--' +@db2+''',
       ''Foreign key'',
       ''Foreign key on ''+a.fktbname+''(''+a.fkcolumns+'')''
  from #fk1 a,#fk2 b
  where a.fktbname=b.fktbname and a.fkcolumns=b.fkcolumns
    and a.pktbname=b.pktbname and a.pkcolumns=b.pkcolumns
    and a.cascade_delete<>b.cascade_delete
')
--foreign key name is different
exec('
insert #difference(desc_difference,objecttype,objectname)
select ''The foreign key name is different: ''+a.fkname+''--'
       +@db1+', ''+b.fkname+''--'+@db2+''',
       ''Foreign key'',
       ''Foreign key on ''+a.fktbname+''(''+a.fkcolumns+'')''
  from #fk1 a,#fk2 b
  where a.fktbname=b.fktbname and a.fkcolumns=b.fkcolumns
    and a.pktbname=b.pktbname and a.pkcolumns=b.pkcolumns
    and a.fkname<>b.fkname
')

select * from #difference

drop table #difference,#tbname,#columns1,#columns2
drop table #indexes1,#indexes2,#check1,#check2,#fk1,#fk2