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--方法一 仅用于SQL Server：
select * into b from a where 1<>1
--方法二：
select top 0 * into b from a

insert into b(a, b, c)
select d,e,f from b;

select a,b,c from a where a IN (select d from b )
或者:
select a,b,c from a where a IN (1,2,3)

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

select 
a.a,
a.b,
a.c,
b.c,
b.d,
b.f
from a
LEFT OUT JOIN b ON a.a = b.c

select * from (
SELECT a,b,c FROM a
) T
where t.a > 1;

select * from table1
where time between time1 and time2
select a,b,c, from table1
where a not between 数值1 and 数值2

select * from table1
where a [not] in (‘值1’,’值2’,’值4’,’值6’)

delete from table1
where not exists (
select * from table2
where table1.field1=table2.field1
)

select * from a
left inner join b on a.a=b.b
right inner join c on a.a=c.c
inner join d on a.a=d.d
where ...

select * from 日程安排
where datediff('minute',f开始时间,getdate())>5

select top 10 b.*
from (
select top 20 主键字段,排序字段
from 表名 order by 排序字段 desc
) a,
表名 b
where b.主键字段 = a.主键字段
order by a.排序字段具体

declare @start int,@end int
@sql  nvarchar(600)
set @sql=’select top’+str(@end-@start+1)+’+from T
where rid not in(
select top’+str(@str-1)+’Rid from T where Rid>-1)’
exec sp_executesql @sql

select top 10 *
form table1
where 范围

(select a from tableA )
except 
(select a from tableB)
except 
(select a from tableC)

select top 10 *
from tablename
order by newid()

--方法一
delete from tablename where id not in (select max(id) from tablename group by col1,col2,...)
--方法二
select distinct * into temp from tablename
delete from tablename
insert into tablename select * from temp

alter table tablename
--添加一个自增列
add  column_b int identity(1,1)
delete from tablename
where column_b not in(
select max(column_b)
from tablename
group by column1,column2,...
)
alter table tablename drop column column_b

use master
go
select name from sysobjects
where type='U' // U代表用户