几种查询表结构的方法

方法一：使用存储结构来执行，查询某一个表的结构

create proc getTableStruct@tabName varchar(20)asSELECT 表名 = case when a.colorder=1 then d.name else '' end, 表说明 = case when a.colorder=1 then isnull(f.value,'') 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 parent_obj=a.id 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],'') FROM syscolumns a left join systypes b on a.xusertype=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 left join sysproperties f on d.id=f.id and f.smallid=0 where d.name in (@tabName) --如果只查询指定表,加上此条件 order by a.id,a.colorderGO

 

方法二：使用存储过程来执行，得到的是这个数据库中所有表及其结构

 CREATE proc sp_tableStruct as-----select ( case when a.colorder = 1 then d.name else '' end ) 表名, a.colorder 字段序号, a.name 字段名, ( case when COLUMNPROPERTY (a.id,a.name,'isidentity') = 1 then '√' else '' end ) 标识, ( case when ( select count(*) from sysobjects where name in ( select name from sysindexes where (id = a.id ) and ( indid in (select indid from sysindexkeys where ( id = a.id ) and ( colid in ( select colid from syscolumns where ( id = a.id ) and ( name = a.name )))))) and ( xtype ='PK')) > 0 then '√' else '' end ) 主键, b.name 类型, a.length 字节数, COLUMNPROPERTY ( a.id,a.name ,'PRECISION' ) as 长度, isnull ( COLUMNPROPERTY ( a.id,a.name ,'Scale'),0) as 小数位数, (case when a.isnullable = 1 then '√' else '' end ) 允许空, isnull ( e.text,'') 默认值, isnull (g.[value],'' ) as 字段说明from syscolumns a left join systypes bon a.xtype = b.xusertypeinner join sysobjects don a.id = d.id and d.xtype='U' and d.name <> 'dtproperties'left join syscomments eon a.cdefault = e.idleft join sysproperties gon a.id = g.id and a.colid = g.smallidorder by a.id ,a.colorderGO

 

方法三：使用查询来查找所有表及表的结构

 

SELECT c.colid AS 序号, o.name AS 表名, c.name AS 列名,t.name AS 类型, c.length AS 长度, c.isnullable AS 允许空,CAST(m.[value] AS Varchar(100)) AS 说明FROM dbo.syscolumns c INNER JOINdbo.sysobjects o ON o.id = c.id AND objectproperty(o.id, N'IsUserTable') = 1 ANDo.name <> 'dtproperties' INNER JOINdbo.systypes t ON t.xusertype = c.xusertype LEFT OUTER JOINdbo.sysproperties m ON m.id = o.id AND m.smallid = c.colorderORDER BY o.name, c.colid