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SQL 一些小技巧         

SQL 一些小技巧

作者:闵涛 文章来源:闵涛的学习笔记 点击数:1026 更新时间:2007/11/14 12:57:22

These has been picked up from thread within sqljunkies Forums http://www.sqljunkies.com

Problem
The problem is that I need to round differently (by halves)
Example: 4.24 rounds to 4.00, but 4.26 rounds to 4.50.
4.74 rounds to 4.50 and 4.76 rounds to 5.00

Solution
declare @t float
set @t = 100.74
select round(@t * 2.0, 0) / 2

Problem
I''''m writing a function that needs to take in a comma seperated list and us it in a where clause. The select would look something like this:

select * from people where firstname in (''''larry'''',''''curly'''',''''moe'''')

Solution
use northwind
go

declare @xVar varchar(50)
set @xVar = ''''anne,janet,nancy,andrew, robert''''

select * from employees where @xVar like ''''%'''' + firstname + ''''%''''

Problem
Need a simple paging sql command

Solution
use northwind
go

select * from products a
where (select count(*) from products b where a.productid >= b.productid) between 15 and 16


Problem
Perform case-sensitive comparision within sql statement without having to use the SET command

Solution

use norhtwind
go

SELECT * FROM products AS t1
WHERE t1.productname COLLATE SQL_EBCDIC280_CP1_CS_AS = ''''Chai''''

--execute this command to get different collate naming
--select * from ::fn_helpcollations()

 

Problem
How to call a stored procedure located in a different server

Solution

SET NOCOUNT ON
use master
go

EXEC sp_addlinkedserver ''''172.16.0.22'''',N''''Sql Server''''
go

Exec sp_link_publication @publisher = ''''172.16.0.22'''',
@publisher_db = ''''Northwind'''',
@publication = ''''NorthWind'''', @security_mode = 2 ,
@login = ''''sa'''' , @password = ''''sa''''
go

EXEC [172.16.0.22].northwind.dbo.CustOrderHist ''''ALFKI''''
go

exec sp_dropserver ''''172.16.0.22'''', ''''droplogins''''
GO


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