SQL常用功能

SQL筛选出相同记录

选出相同记录的SQL语句是：

select * from tableName where id in (

select id from tableName group by id having count(*) > 1)

删除相同记录的SQL语句是：

delete from tableName where id in (

select id from tableName group by id having count(*) > 1)

例如:
select * from book where isbn in (

select isbn from book group by isbn having count(*) > 1)

MSSQL ID自动从１开始[/u]

DBCC CHECKIDENT (表名, RESEED, 0) ＞＞MSSQL ID自动从１开始 或者 truncate table tablename

把存储过程记录集新增到另一表 INSERT INTO EXEC

truncate table [tablename] 清空表,ID自动从１开始,

INSERT INTO [tablename]

EXEC [dbo].[spname]

@parameters = 0