SQL 一些小技巧

核心提示：These has been picked up from thread within sqljunkies Forums http://www.sqljunkies.comProblemThe problem is that I need to round differently (by halves) Exampl

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(WINDOWS平台上强大的数据库平台)'
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