SQL SERVER获得指定表的主键

 2     Declare @table_name varchar(100)
 3     Set @table_name=‘table_Pqs‘
 4     --1、可以根据系统存储过程
 5     Execute   sp_pkeys @table_name
 6 
 7     --2、根据系统表获得
 8     Declare @objectid int
 9     Set @objectid=object_id(@table_name)
10     Select   
11     col_name(@objectid,colid)  ‘主键字段‘
12     From  sysobjects         as o
13     Inner Join sysindexes    as i On i.name=o.name 
14     Inner Join sysindexkeys  as k On k.indid=i.indid
15     Where 
16     o.xtype = ‘PK‘ and parent_obj=@objectid and k.id=@objectid