Comments on: SQL SERVER – 2005 T-SQL Paging Query Technique Comparison (OVER and ROW_NUMBER()) – CTE vs. Derived Table

By: Nandish

Nandish — Tue, 27 Oct 2009 14:18:31 +0000

Hi Pinal,

Great query…

Fantastic..it works perfactly…

By: Faisal

Faisal — Wed, 21 Oct 2009 10:14:56 +0000

Great Query..

I think u’r master of Query.. hahaha

Thank u very much… :)

By: SQL SERVER - Guidelines and Coding Standards Part - 1 Journey to SQL Authority with Pinal Dave

Thu, 26 Feb 2009 12:13:43 +0000

[...] Avoid using temporary tables and derived tables as it uses more disks I/O. Instead use CTE (Common Table Expression); its scope is limited to the next statement in SQL query. (Read More Here) [...]

By: SQLAuthority News - Best Articles on SQLAuthority.com Journey to SQL Authority with Pinal Dave

Tue, 24 Feb 2009 12:09:10 +0000

[...] SQL SERVER – 2005 T-SQL Paging Query Technique Comparison (OVER and ROW_NUMBER()) – CTE vs. Derived … [...]

By: Chip H

Chip H — Sun, 11 Jan 2009 17:47:49 +0000

Note that because of the inner ORDER BY clause the entire table will need to be sorted prior to the CTE with it’s ROW_NUMBER value being used. This is a good time to have an alternate index on the columns you’re ordering by. :)

You can verify this by examining the execution plan before and after adding the alternate index. Don’t forget to do a ALTER INDEX {alternateindexname} ON {tablename} REBUILD prior to examining the plan so that SQL Server has fresh statistics to work with.

By: C.P.Usman

C.P.Usman — Sat, 25 Oct 2008 08:54:56 +0000

The post is very usefull and so much thanks.
here i have one more doubts that how I can send criteria (dynamic) to this qeury. I want to show the result by page. But the result for some particular conditions. If you have any idea.. Please give me some shot.

thanks again

By: Manjunath

Manjunath — Wed, 16 Apr 2008 13:05:50 +0000

Hi Pinal,

I have a table with 2 million records, i have created a Full text Index on a nvarchar column ‘itemName’ of size 70. When i do a query like:

WITH ListTemp AS (Select ROW_NUMBER() OVER( ORDER BY [main].[itemName] ASC) as rownum,
main.itemname,main.itemdescription
FROM
CONTAINSTABLE([ItemTemp1], itemname, ‘chevrolet’) AS A
join [ItemTemp1] main on a.[key] = main.id
)
SELECT * FROM ListTemp WHERE rownum > 0 AND rownum <11 ORDER BY rownum

it takes more than a minute to execute.

While a query like:

select main.itemname,main.itemdescription
FROM CONTAINSTABLE([ItemTemp1], itemname, ‘chevrolet’) AS A
join [ItemTemp1] main on a.[key] = main.id

executes in a few seconds.

Will not a full text search perform well when placed in a CTE?

By: Adi Gaber

Adi Gaber — Mon, 31 Mar 2008 23:20:19 +0000

Check out my blog for a solution to fetching the last page efficiently.

By: Arnab Mukherjee

Arnab Mukherjee — Thu, 07 Feb 2008 10:17:43 +0000

The code is pretty simple. But the problem is that it sorts the data that is coming out. And OVER() method needs an “order by” in it’s parameter. So if we want the data as it is in the database it is not possible in this way. If there is any way to eliminate the sorting then i think the code will be more appropriate.

By: Joe

Joe — Fri, 01 Feb 2008 21:06:08 +0000

You could always use “top” to limit the number of rows returned by the subquery…then you would only have the massive derived table if you actually paged to the end of the data.

By: Mark

Mark — Sat, 19 Jan 2008 21:40:41 +0000

So it’s creating a Derived Table, almost like a temp table and creating a row number column?

What happens if you have to page through 50,000 rows???

First it will create a massive 50,000 row Derived table – with the row number column, then you select from the Derived table.

Can’t see that being good for memory or cpu performance.

Any other solutions?

By: vijayyande

vijayyande — Wed, 29 Aug 2007 10:27:28 +0000

Hi pinal

Thanks for your valuable suggestion about paging. I am very thankful for that.

Please suggest some good method to do paging for sql server 2000.

thanks
vijay

By: K. Shiva Prakash

K. Shiva Prakash — Tue, 10 Jul 2007 05:40:16 +0000

Hello, Pinal ,

I am facing one problem. I did the paging is MSSQL 2005. and now i binded it to the controls ( returned datasets). When i clicked on the next page then, is i have to come back to the sqlserver with new startrow and endrow values ?.

By: Ajax Database Best Practices Joey JavaScript

Ajax Database Best Practices Joey JavaScript — Tue, 19 Jun 2007 03:56:02 +0000

[...] 9) If retrieving multiple rows, always use database paging techniques to retrieve only the rows which are necessary (displayed on screen). Click here for more information on how to do this [...]