Comments on: SQL SERVER – Rules for Optimizining Any Query – Best Practices for Query Optimization

By: SQL SERVER – Weekly Series – Memory Lane – #014 « SQL Server Journey with SQL Authority

Sat, 02 Feb 2013 01:30:54 +0000

[...] Generate A Single Random Number for Range of Rows of Any Table – Very interesting Question from Re…Generating random number has been always fun to me. Though the word says random, nothing is truly random if you look at it. To generate the random number has had to use logic and make sure that the number is really random and not predictable. In this blog post, I go over a couple of methods of how to generate random numbers. [...]

By: SQL SERVER – Weekly Series – Memory Lane – #013 « SQL Server Journey with SQL Authority

Sat, 26 Jan 2013 01:31:19 +0000

[...] Rules for Optimizining Any Query – Best Practices for Query Optimization In this article I have not focused on depth but listed something of the simple tricks which DBA can apply to gain immediate performance gain. Though the tricks are very simple, if we notice carefully in our product server, we will find many of those not followed. [...]

By: Anuj Desai

Anuj Desai — Wed, 23 Jan 2013 06:13:24 +0000

Hi Pinal,

This was really helpful information for me. Can you optimize the query while using a ORDER BY clause for quick sorting of data records?

By: Sumit

Sumit — Wed, 26 Dec 2012 07:37:59 +0000

What about @table and #table… how it hurts performance.

By: dasht

dasht — Wed, 28 Nov 2012 19:27:49 +0000

can any one plz tell me the tools used for query optimization for sql from the erspective of data warehouse

By: Girijesh Pandey

Girijesh Pandey — Mon, 01 Oct 2012 17:37:14 +0000

Hi Pinal,
Nice blog!

By: swati lodha

swati lodha — Fri, 18 Nov 2011 12:54:07 +0000

Hello sir,

\very Nice Blog of u.Thanks for putting such helpful information on your blog. It always helped me to find solutions for queries.

By: Sandeep B

Sandeep B — Thu, 20 Oct 2011 10:13:40 +0000

Hi Pinal,

Thanks for putting such helpful information on your blog. It always helped me to find solutions for queries. Thanks again.

Sandeep B

By: vijaya kumar

vijaya kumar — Mon, 05 Sep 2011 08:31:55 +0000

Hello,
How to write a syntax for T-SQL,user defined functions and stored block procedure.

By: Harsh

Harsh — Thu, 29 Apr 2010 13:14:16 +0000

Surersh,
Create a text file of the table and use it as a source instead of directly using the table as the source.
You can use the cmd utility called bcp.exe to create the text file. Please reply as to how it works out.

By: Suresh

Suresh — Mon, 15 Mar 2010 11:25:34 +0000

I am suresh. Thjs is my question.

I am inserting 8 lacks records from source table to multiple destination table with some ETL operation. First 10000 records getting inserted in 10 minutes and after that it takes 20 minutes to insert 2000 records it keeps on increasing the time. what would be the solution. plz asap

By: Nilesh

Nilesh — Wed, 18 Nov 2009 12:55:26 +0000

Pinal,

Many time I am reading your blogs.
In this article you have mentioend very very basic optimization technique.

I would request you to separate your articale for expert, beginners etc.

-Nilesh

By: Hidha

Hidha — Thu, 24 Sep 2009 05:17:14 +0000

Thanks for the Tips. It was useful.

By: Shubhangi

Shubhangi — Wed, 16 Sep 2009 05:10:57 +0000

Hello Pinal,

I wanted I wanted to know which kind of queries can be moved to stored procedures. Can you please guide me on Ad- Hoc, dynamic and parametrized queries in reference to SP. What will be beneficial for performance improvement?

By: Narenndra

Narenndra — Thu, 23 Jul 2009 12:05:32 +0000

Hi Hoapino and all,

Will d views occupy place in the Database?N can some one help me the meaning of MOVE D LOGIC OF UDF TO SP

Thanks,
Narenndra

By: jayant das

jayant das — Wed, 01 Jul 2009 12:12:14 +0000

Hi Pinal Dave

This is very usefull to my daily work as dba thanks alot

Jayant

By: Net Wolf (Hoapino)

Net Wolf (Hoapino) — Tue, 02 Jun 2009 14:47:47 +0000

In simple terms views like any other sql statements need to be compiled then executed which comsumes time and space for large amount of data unlike stored procs which are already precompiled

By: Net Wolf (Hoapino)

Net Wolf (Hoapino) — Tue, 02 Jun 2009 14:14:44 +0000

Hi Sourabh
If you look closely at Dave’s article, you’ll want to change the article to “Tips for db optimization”. This is because he touched on table maintanance, views Vs stored procs, triggers and we use queries in all the above processes but tables.

Now to attend to your question, views act like replicated table combination and are updated instantly as the tables get data, so in the testing enviroment they appear to behave due to small amount of data and reduced concurrency on data access thats why Michale says he has seen people suffering. In addition it is even a hastle to troubleshoot mishaps. All in all, try to check views vs stored procedures.

As for you Dave, keep up the good work

By: Xwalker

Xwalker — Fri, 06 Feb 2009 05:51:12 +0000

Thank you for wonderful article.

By: Durgesh Walker

Durgesh Walker — Fri, 06 Feb 2009 05:11:50 +0000

Hi i am durgesh…..

By: Sourabh Sachdeva

Sourabh Sachdeva — Wed, 04 Feb 2009 11:24:28 +0000

Hey Pinal Nice artical man,

Its really useful for optimizing sql qry or procedure. But can anyone tell that why dave says that do not to use Views or replace views with original source table?

By: Sandle Wood

Sandle Wood — Wed, 28 Jan 2009 17:47:53 +0000

Ya its a good for getting any correct output and also for optimization…..

By: Ankit Agrawal

Ankit Agrawal — Sun, 25 Jan 2009 07:14:14 +0000

I have the question about the following 2 points:

-Table should have minimum of one clustered index
Q: Can there be more than one clustered index on a table? If Yes, how and when they shall be used?

-Table should have appropriate amount of non-clustered index
Q: Creating unnecessarily huge number of non-clustered index(s) also brings the performance down for a table. Is it a good practice to create non-clustered index(s) on the fly in the stored procs as and when they should be needed? Could there be any downside of it?

Your blog is great… thanQ very much!

By: jaydee

jaydee — Sat, 24 Jan 2009 16:47:46 +0000

hi pinal,
As you said that, we should have non clustered index.
Can you say how to add a non-clustered apart from primary key.

By: It Jobs

It Jobs — Thu, 22 Jan 2009 13:50:48 +0000

In a high-load situation, inline SQL can cause high utilization of the network bandwidth – also, if you have a query with a length greather than 8000 chars (a coomplicated search, for example) you have to use a sproc.