Click here to Skip to main content
Click here to Skip to main content
Alternative Tip

Tagged as

Go to top

Efficient paging using SQL script

, 28 Dec 2011
Rate this:
Please Sign up or sign in to vote.
Hi, what about such solution?DECLARE @pageNumber INTDECLARE @rowsOnPage INTSET @rowsOnPage=5SET @pageNumber=2DECLARE @totalItemsToSelect INTSET @totalItemsToSelect=@rowsOnPage * @pageNumberSELECT TOP (@rowsOnPage) * FROM MainTrans WHERE ID IN( SELECT TOP...
Hi, what about such solution?
 
DECLARE @pageNumber INT
DECLARE @rowsOnPage INT
 
SET @rowsOnPage=5
SET @pageNumber=2
 
DECLARE @totalItemsToSelect INT
SET @totalItemsToSelect=@rowsOnPage * @pageNumber
 
SELECT TOP (@rowsOnPage) * FROM MainTrans WHERE ID IN
(
    SELECT TOP (@totalItemsToSelect) ID FROM MainTrans ORDER BY ID DESC
) ORDER BY ID ASC
it looks much shorter.
 
Thanks,
Kiryl
 
P.S. of course this solution works only if you have identity column. in my opinion identity column is a must for paging, moreover this approach works for any database not only for MS SQL

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

NeoPunk

Belarus Belarus
No Biography provided

Comments and Discussions

 
GeneralReason for my vote of 4 I think this script works well, but ... PinmemberRobby Tendean28-Dec-11 16:12 
GeneralReason for my vote of 3 The alternative is pretty solid if y... PinmemberHelluin28-Dec-11 6:01 
GeneralActually: 1. TOP does not work on Oracle (at least versions ... PinmemberPablo Aliskevicius28-Dec-11 4:38 
Actually:
1. TOP does not work on Oracle (at least versions 8 through 10, the ones I worked with).
2. The IDENTITY field is usually meaningless. For instance, in Robby's example, some user is paging by a date column; let's say that column is the birth date of a person; there is no guarantee that the records were created on a 'first born, first entered' order.
The ROWNUMBER function seems to be a lesser evil: another option would be getting all the relevant records into the client, and paging there.
JM2B,

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web04 | 2.8.140916.1 | Last Updated 28 Dec 2011
Article Copyright 2011 by NeoPunk
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid