批量修改数据结构

        说明：最新公司的产品要更新数据结构，客户数量大概在万级以上

，每个客户都是单独的数据库

，需要将所有表中金额类型的字段变成默认值为0

 

SELECT  表名=case when a.colorder=1 then d.name else '' end,
字段序号=a.colorder,
字段名=a.name,
标识=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,
主键=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and name
   in (  SELECT name FROM sysindexes WHERE indid
    in(   SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid  )))
     then '√' else '' end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允许空=case when a.isnullable=1 then '√'else '' end,
默认值=isnull(e.text,''),
字段说明=isnull(g.[value],'')
,'ALTER TABLE '+d.name+' ADD CONSTRAINT DF_'+d.name+'_'+a.name +' DEFAULT 0 FOR '+a.name as 给列添加默认值
FROM syscolumns a left join systypes b on a.xtype=b.xusertype
 inner join sysobjects d on a.id=d.id 
   and d.xtype='U' and  d.name<>'dtproperties'
   left join syscomments e on a.cdefault=e.id
left join sysproperties g on a.id=g.id
   and a.colid=g.smallid 
where lower(b.name) in('money','int','numeric','decimal') and
isnull(e.text,'')='' and a.isnullable=1
and d.name like '%WFPUSER%'
   order by a.id,a.colorder