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)<5

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

select * from tablename where column1 like ''[A-M]%''           这样可以选择出column 字段中首字母在A-M 之间

的记录
select * from tablename where column1 like ''[ABC]%''           这样可以选择出column 字段中首字母是A 或者B

或者C 的记录
select * from tablename where column1 like ''[A-CG]%''         这样可以选择出column 字段中首字母在A-C 之间的

或者是G 的记录
select * from tablename where column1 like ''[^C]%''            这样可以选择出column 字段中首字母不是C 的记

录
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 1<>1   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