SQL 一些小技巧

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SQL 一些小技巧

日期:2007-05-08   荐:

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

ProblemThe 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

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

ProblemI'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')

Solutionuse northwind go

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

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

ProblemNeed a simple paging sql command

Solutionuse northwind go

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

ProblemPerform 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()

ProblemHow 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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