常用SQL语句(嵌套子查询/随机等等)详细整理

复制代码 代码如下:

insert into Table1(Name,des,num) values ('ltp','thisisbest',10);
select @@identity as 'Id'

复制代码 代码如下:

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

复制代码 代码如下:

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

复制代码 代码如下:

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

复制代码 代码如下:

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

复制代码 代码如下:

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

复制代码 代码如下:

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

复制代码 代码如下:

select * from UserValue where UserID between 2 and 5;

复制代码 代码如下:

Select * from TabSchedule where datediff(minute,getdate(),开始时间)<5

复制代码 代码如下:

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

复制代码 代码如下:

Select * From TableName Order By CustomerName Collate Chinese_PRC_Stroke_ci_as

复制代码 代码如下:

1.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
2.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
3.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
4.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

复制代码 代码如下:

select * into b from a where 1<>1 或 select top 0 * into [b] from [a]

复制代码 代码如下:

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