USE [Role]
GO

/*Create a table*/
IF OBJECT_ID (‘dbo.Users‘, ‘U‘) IS NOT NULL
    DROP TABLE Users
GO
CREATE TABLE [dbo].[Users](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [UserName] [varchar](50) NOT NULL,
    [Password] [varchar](20) NOT NULL,
    [TrueName] [varchar](50) NULL,
    [sex] [varchar](2) NULL,
    [Birthday] [datetime] NULL,
    [Phone] [varchar](20) NULL,
    [Email] [varchar](50) NULL,
    [CreateTime] [datetime] NULL,
 CONSTRAINT [PK_Accounts_Users] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

/*Create procedure about select*/
IF OBJECT_ID(‘GetUserBy‘,‘p‘) IS NOT NULL
    DROP PROCEDURE GetUserBy
GO
CREATE PROCEDURE GetUserBy
    @id int
    AS
    BEGIN
        SELECT ID,UserName,Password,TrueName,sex,Birthday,Phone,Email FROM [Users] WHERE [Users].[ID]=@id
    END
GO

EXECUTE GetUserBy @id=1
GO

/*Insert*/
CREATE PROCEDURE Insertuser
     @userName varchar(50)
    ,@password varchar(20)
    ,@trueName varchar(50)
    ,@sex varchar(2)
    ,@birthday datetime
    ,@phone varchar(20)
    ,@email varchar(20)
    AS
    BEGIN
        INSERT INTO [Users]([UserName],[Password],[TrueName],[sex],[Birthday],[Phone],[Email],[CreateTime])
         VALUES(@userName,@password,@trueName,@sex,@birthday,@phone,@email,GETDATE())
    END
GO

EXECUTE Insertuser @userName=‘Admin‘,@password=‘123456‘
,@truename=‘Adminstrator‘,@sex=‘男‘,@birthday=‘2014-08-31‘
,@phone=‘12345677‘,@email=‘a@136.com‘
Go
/*Insert user return id*/
CREATE PROCEDURE InsertUserReturenId
     @userName varchar(50)
    ,@password varchar(20)
    ,@trueName varchar(50)
    ,@sex varchar(2)
    ,@birthday datetime
    ,@phone varchar(20)
    ,@email varchar(20)
    AS
    BEGIN
        INSERT INTO [Users]([UserName],[Password],[TrueName],[sex],[Birthday],[Phone],[Email],[CreateTime])
         VALUES(@userName,@password,@trueName,@sex,@birthday,@phone,@email,GETDATE());
         SELECT @@IDENTITY
    END
GO

EXECUTE InsertUserReturenId @userName=‘Admin‘,@password=‘123456‘
,@truename=‘Adminstrator‘,@sex=‘男‘,@birthday=‘2014-08-31‘
,@phone=‘12345677‘,@email=‘a@136.com‘
Go

/*Update*/
CREATE PROCEDURE UpdateUser
     @id int
    ,@password varchar(20)
    AS
    BEGIN
        UPDATE [Users] SET [Password]=@password WHERE [ID]=@id
    END
GO

EXECUTE UpdateUser @id=15,@password=‘1234567‘
GO
/*Delete*/
CREATE PROCEDURE DeleteUserById
    @id int
    AS
    BEGIN
        DELETE FROM [Users] WHERE [ID]=@id
    END
GO

EXECUTE DeleteUserById @id=1
GO    

/**Clear table**/

Truncate table [Users]
GO

/*loop insert data*/
DECLARE
 @userName varchar(50)
,@password varchar(20)
,@trueName varchar(50)
,@sex varchar(2)
,@birthday datetime
,@phone varchar(20)
,@email varchar(20)
,@i int

SET @userName=‘Admin‘
SET @password=‘123456‘
SET @trueName=‘Adminstrator‘
SET @sex=‘男‘
SET @birthday=‘2014-08-31‘
SET @phone=‘111111111‘
SET @email=‘q@138.com‘
SET @i=30

WHILE @i<31
BEGIN
    SET @userName=‘admin‘+CONVERT(varchar(2),@i)
    INSERT INTO [Users]([UserName],[Password],[TrueName],[sex],[Birthday],[Phone],[Email],[CreateTime])
     VALUES(@userName,@password,@trueName,@sex,@birthday,@phone,@email,GETDATE())
     SET @i=@i+1
END
GO

/*Page and sort*/
CREATE PROCEDURE QueryUserByPage1
    @pageSize int
    ,@currentPage int
    ,@searchName varchar(50)
    ,@flag int
    AS
    DECLARE @startPgae int,@endPage int,@sort varchar(50),@sql varchar(1000)
    SET @startPgae=@currentPage * @pageSize
    SET @endPage=@startPgae + @pageSize -1
    SET @sort=
            CASE WHEN @flag=1 THEN ‘ID‘
                 WHEN @flag=2 THEN ‘UserName‘
                 WHEN @flag=3 THEN ‘CreateTime‘
    END
    BEGIN 
        SELECT ROW_NUMBER() OVER(ORDER BY @sort DESC) AS userId FROM [Users]
         WHERE useId BETWEEN @startPgae AND @endPage
    END
GO

/*Pgae*/
IF OBJECT_ID (‘QueryUserByPage‘, ‘p‘) IS NOT NULL
    DROP PROCEDURE QueryUserByPage
GO
CREATE PROCEDURE QueryUserByPage
    @pageSize int
    ,@currentPage int
    ,@searchName varchar(50)
    AS
    DECLARE @startPgae int,@endPage int
    SET @startPgae=(@currentPage-1) * @pageSize + 1
    SET @endPage=@startPgae + @pageSize - 1
    SET @searchName=‘%‘+RTRIM(@searchName)+‘%‘
    BEGIN 
         SELECT * FROM
          (
          SELECT *, ROW_NUMBER() OVER(ORDER BY ID DESC) AS userId
           FROM [Users]
            WHERE 
            [UserName] LIKE @searchName
          )
          tuser
         WHERE tuser.userId BETWEEN @startPgae AND @endPage
    END
GO

/*拼接字符串分页*/
CREATE PROCEDURE QueryUserByPage2
        @start int
        ,@end int
    AS
    DECLARE  @sql  nvarchar(600)
    set @sql=‘select top ‘+str(@end-@start+1)+‘ * from Users where ID not in(select top‘+str(@start-1)+‘ ID from Users)‘
    BEGIN
        execute(@sql)
    END
GO

QueryUserByPage2 @start=2,@end=10
GO

EXECUTE QueryUserByPage @pageSize=10,@currentPage=1,@searchName=‘1‘
GO

DECLARE
     @name varchar(50)
    ,@description varchar(50)
    ,@i int
SET    @description=‘teacher‘
SET @i=1
WHILE @i<=10
BEGIN
    SET @name = ‘teacher‘ + CONVERT(varchar(2),@i)
    INSERT INTO [Roles] VALUES(@name,@description)
    SET @i=@i+1
END
GO

SELECT * from Roles

TRUNCATE table Roles
GO

SELECT * FROM [UserRoles]
LEFT JOIN [Roles] ON [UserRoles].[RoleID]=[Roles].[ID]
WHERE [UserRoles].[UserID]=1


    
    
    

选择：select * from table1 where 范围
插入：insert into table1(field1,field2) values(value1,value2)
删除：delete from table1 where 范围
更新：update table1 set field1=value1 where 范围
查找：select * from table1 where field1 like ’%value1%’ ---like的语法很精妙，查资料!
排序：select * from table1 order by field1,field2 [desc]
总数：select count as totalcount from table1
求和：select sum(field1) as sumvalue from table1
平均：select avg(field1) as avgvalue from table1
最大：select max(field1) as maxvalue from table1
最小：select min(field1) as minvalue from table1

随机产生
select top 10 * from Users order by newid()

左外连接 （Left  Jion）：包含左边表的全部行（不管右边的表中是否存在与它们匹配的行），以及右边表中全部匹配的行
select * from test1 left join test2 on test1.id = test2.id

右外连接 (Rigt  Jion)：包含右边表的全部行（不管左边的表中是否存在与它们匹配的行），以及左边表中全部匹配的行

select * from test1 right join test2 on test1.id = test2.id

declare @name varchar(50),@flag int
SET @name = 
  CASE 
     WHEN @flag =  0 THEN ‘Mfg item - not for resale‘
     WHEN @flag < 50 THEN ‘Under $50‘
     WHEN @flag >= 50 and @flag < 250 THEN ‘Under $250‘
     WHEN @flag >= 250 and @flag < 1000 THEN ‘Under $1000‘
     ELSE ‘Over $1000‘
  END

IF @cost <= @compareprice 
BEGIN
    PRINT ‘These products can be purchased for less than 
    $‘+RTRIM(CAST(@compareprice AS varchar(20)))+‘.‘
END