一些T-SQL语句

 

use DM;
go
if exists (select * from sysobjects where xtype = 'U' and name = 'newtest')
drop table newtest
go

select  abs , Len (abs) as Number  into newtest from epsps_2 order by abs desc

 

 

 

 

 

 

 

select * from t_colliery
-----------如果表存在就删除，否则就创建新表方法----------
-----方法(1)------------

if exists (SELECT   name   from   sysobjects   where   type='U'   and   name='t_colliery')
begin
drop table t_colliery
end
else
begin
create table t_colliery
(
   id varchar(30) null,
   collieryname varchar(100) null
   )
end
-----方法(2)------------
if object_id('t_colliery') is not null
   drop table t_colliery
go
create table t_colliery
(
   id varchar(30) null,
   collieryname varchar(100) null
   )

---------------------方法(3)

if exists (select * from sysobjects where xtype = 'U' and name = 't_colliery')
drop table tableName
go

create table t_colliery
(
   id varchar(30) null,
   collieryname varchar(100) null
   )
------------------------方法（4）-----------
if exists (select * from sysobjects where id = object_id('t_colliery'))
drop table t_colliery
GO
create table t_colliery
(
   id varchar(30) null,
   collieryname varchar(100) null
   )
GO

 

 

---

 

转置

use t222
go
select id,name,
[1] as "一季度",
[2] as "二季度",
[3] as "三季度",
[4] as "四季度",
[5] as "5"
from
test
pivot
(
sum(profile)
for quarter in
([1],[2],[3],[4],[5])
)
as pvt