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常用SQL语句汇总整理

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1.SQL 插入语句得到自动生成的递增ID 值 insert into Table1(Name,des,num) values ('ltp','thisisbest',10); select @@identity as 'Id' 2.实现是1 或0 想显示为男或女 select name,Sex=(case Sexwhen '1' then '男'when '0' then '女'end)from Tablename

 

1.SQL 插入语句得到自动生成的递增ID 值

       insert into Table1(Name,des,num) values ('ltp','thisisbest',10);

       select @@identity as 'Id'

2.实现是1 或0 想显示为男或女

      select name,Sex=(case Sex when '1' then '男' when '0' then '女' end) from Tablename

3.嵌套子查询

     select a,b,c from Table1 where a IN (select a from Table2)

4.显示文章、提交人和最后回复时间

    select a.title,a.username,b.adddate from tablename a,(select max(adddate) adddate from tablename where tablename.title=a.title) b

5.随机提取条记录的例子

    SQL Server:Select Top 10 * From Tablename Order By NewID()

    Access:Select Top 10 * From Tablename Order By Rnd(ID)

    Rnd(ID) 其中的ID 是自动编号字段,可以利用其他任何数值来完成,比如用姓名字段UserName

    Select Top 10 * From 表Order BY Rnd(Len(UserName))

    MySql:Select * From 表Order By Rand() Limit 10

6.在同一表内找相同属性的记录

     select UserID from Accounts_Users where UserName is not null group by UserID having count (*)>1

7.查询类别所有的产品对应数据

      SELECT CategoryName,ProductName FROM Categories LEFT JOIN Products ON Categories.CategoryID = Products.CategoryID;

8.按范围查询编号在2 到5 之间的用户信息

     select * from UserValue where UserID between 2 and 5;

9.日程安排提前5 分钟提醒

     Select * from TabSchedule where datediff(minute,getdate(),开始时间)

10.得出某日期所在月份的最大天数

    SELECT DAY(DATEADD(dd, -DAY('2008-02-13'),DATEADD(mm, 1, '2008-02-13'))) AS 'DayNumber'

11.按姓氏笔画排序

    Select * From TableName Order By CustomerName Collate Chinese_PRC_Stroke_ci_as

12.通配符的一些用法

13.复制表结构(只复制结构,源表名:a,目标表名:b)

         select * into b from a where 11   或     select top 0 * into [b] from [a]

14.复制表数据(复制数据,源表名:a,,目标表名:b)

        insert into b(Name,des,num) select Name,des,num from Table1;

15.  创建分页存储过程

      --创建分页的存储过程
      create proc usp_GetPagedData
      @pageIndex int, --页码
      @pageSize int, --每页显示几条
      @pageCount int output --共多少页
      as
      declare @count int
      select @count = count(*) from TableName
      set @pageCount = ceiling(@count*1.0/@pageSize)

      select * from 
      (select *,ROW_NUMBER() over(order by ColumnName desc) as num
      from TableName) as t
      where num between (@pageIndex-1)*@pageSize + 1 and @pageIndex*@pageSize

      --测试存储过程
      declare @n int
      exec usp_GetPagedData 3,4,@n output
      print @n

 

 

转自: Server/48553.html

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