SQL Server - 小鸟系列之T-SQL基础篇

Create Table dbo.UserInfo
(
Id int identity(1,1) primary key ,
Name varchar(100) Constraint UQ_Name unique,--创建唯一约束
CreatedTime DateTime,
CreatedUser varchar(50)
)

EXEC sp_rename 'UserInfo','UserInfo2'

EXEC sp_rename 'UserInfo.Name','UserName','column'

Alter Table UserInfo Alter Column Name Char(100)

Alter Table UserInfo Add EditTime varchar(100)

Alter Table UserInfo Add Constraint CK_UserInfoName Unique(Name)

If Exists(Select * From syscolumns Where id=object_id('UserInfo') and name='Name' )
Begin
Print '存在'
End

If Exists(Select tab.name AS [表名],idx.name AS [约束名称],col.name AS [约束列名]
From sys.indexes idx
Join sys.index_columns idxCol On(idx.object_id = idxCol.object_id And idx.index_id = idxCol.index_id And idx.is_unique_constraint = 1)
Join sys.tables tab On (idx.object_id = tab.object_id)
Join sys.columns col On (idx.object_id = col.object_id And idxCol.column_id = col.column_id)
Where tab.name = 'UserInfo' And idx.name = 'CK_UserInfoName')
Begin
Print '存在'
End

Alter Table UserInfo Drop Constraint UserInfoName

Alter Table UserInfo Drop Column Name

If Exists (Select * From sysobjects Where name = 'UserInfo' And type = 'U')
Begin
Print '存在'
End

Drop Table UserInfo

Delete from UserInfo Where Id = 1

select Lower(name) from UserInfo
select Upper(name) from UserInfo

select * from UserInfo where Name like '欧阳_'

IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[USP_SIS30_DataWarehouse_JobApplication_FullProfile_Convert]') AND type in (N'P', N'PC'))
BEGIN
Drop Proc dbo.USP_SIS30_DataWarehouse_JobApplication_FullProfile_Convert
END