SQL Server拾遗

if exists( 2 select * from sysobjects where id=OBJECT_ID(N‘[dbo].[Users]‘) 3 and OBJECTPROPERTY(id, N‘IsUserTable‘)=1 4 ) 5 drop table [dbo].[Users] 2.SQL Server新增列

1 ALTER TABLE Table_Name
2 ADD Field_Name Data_Type

3.SQL Server刪除列

1 ALTER TABLE Table_Name
2 DROP COLUMN Field_Name

4.随机取数

1 select top 10 * from Table_Name order by newid()

随机在一个表中取10条数  

SQL Server拾遗

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