生成数据库所有表结构的方法，你可以用来查询主键，主键类型等相关操作。
SQL代码
- SELECT
- (case when a.colorder=1 then d.name else '' end) N'表名',
- a.colorder N'字段序号',
- a.name N'字段名',
- (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) N'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) N'主键',
- b.name N'类型',
- a.length N'占用字节数',
- COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'长度',
- isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小数位数',
- (case when a.isnullable=1 then '√'else '' end) N'允许空',
- isnull(e.text,'') N'默认值',
- isnull(g.[value],'') AS N'字段说明'
- --into ##tx
- 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
- order by object_name(a.id),a.colorder
全部代码如上，信息来源：http://topic.csdn.net/t/20031223/15/2594160.html
