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SQL 一些小技巧

王朝mssql·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

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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