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Execution Plans


Execution Plans

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Dionisio T Manzo
Dionisio T Manzo
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A nice topic but it needs to explain what does the statistics is all about so that the execution plan can say the sql statement is optimized.
J Wright
J Wright
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Good article. Used the exact names of the index methods many times(so it should be easy to find in the future).

However, who really needs help in tuning a simple (select somecolumn1, somecolumn2, somecolumn3 from sometable) query? Don't get me wrong, the article had value, but I never have perfomance troubles with the simple queries. The ones with 4 or more joins involved cause troubles for us to tune.

It's not just this article... I'd love to see more exaples that are closer to real world usage of a SQL server using realtional data...

I'd love to see a follow up article on this that would give us a deeper understanding of SQL tuning.


Pankaj Khanna
Pankaj Khanna
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Excellent article. It is really well explained.

Pankaj Khanna
Database Administrator - SQL Server 2000

Keep hope to keep you intact...
vidhya-373059
vidhya-373059
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Goodone.Even Beginner can Understand from his explanation.Thanks Vijay!!!


kakarato
kakarato
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Good Thumbs UP. Must read for beginner.
Mohan Mariyappa
Mohan Mariyappa
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As long as one understand what author is trying to explain, what language or for that matter grammer do not matter. One needs to understand, he is not teaching English. Great work VijayKumar.
kannanchery
kannanchery
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Vijay,

Good Explain and i like the way of explaining.





ganeshc27
ganeshc27
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Nice article.


Regards,

Ganesh

chandrajit.samanta
chandrajit.samanta
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Date: 14th November 2007
Hi Vijay!
I am Chandrajit Samanta, working in a product based s/w org (Metrica Systems Pvt. Ltd.) in Bangalore. We are using SQL Server 2000, C#, ASP.NET for our product. My work is mainly database intensive. Frequently I have to deal with heterogeneous database environment like Informix, Oracle, Sql Server simultaniously.

I have to fetch records from Informix, oracle database to our SQL Server Database. For which I have to create several DTS.

But the problem is, original tables (Informix,Oracle) has billions of records. For that to run one simple query like (Select * from Table_name where dtDate > '2007-11-01 17:00:00.000') in DTS it tooks 25min - 35min time.

We have only "Read Only " access i.e. select priviledge to all those (Informix,Oracle) database.

Please tell me how to improve such query so that this query running time is minimized.

I am waiting for your response.
Regards,
Chandrajit Samanta
chandrajit.samanta@gmail.com
MBM(Systems),B.E.(Electrical)
9986044300, Bangalore
aspirant.dba
aspirant.dba
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Good Job Vijay & appreciate your sharing attitude.
Please continue posting such in future too.
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