sql server 创建主键

代码

if   not   exists  ( select   *   from  dbo.sysobjects  where  id  =   object_id (N ' [dbo].[主键名称] ' )  and   OBJECTPROPERTY (id, N ' IsPrimaryKey ' )  =   1 )

ALTER   TABLE   [ dbo ] . [ 表名 ]   WITH   NOCHECK   ADD  

CONSTRAINT   [ 主键名 ]   PRIMARY   KEY   CLUSTERED  

(

[ 字段 ]   ASC

) WITH   FILLFACTOR   =   90   ON   [ PRIMARY ]