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Discuss content posted by Prakriti Agrawal
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SARGable
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SARGable
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agrawal.prakriti
agrawal.prakriti
Posted Thursday, February 25, 2010 10:37 PM
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Comments posted to this topic are about the item
SARGable
Post #873171
WayneS
WayneS
Posted Thursday, February 25, 2010 10:38 PM
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The "correct" answer doesn't have a column in the where clause... how can that be SARGable?
Wayne
Microsoft Certified Master: SQL Server 2008
If you can't explain to another person how the code that you're copying from the internet works, then
DON'T USE IT
on a production system! After all,
you
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Links:
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Using APPLY Part 1
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Splitting Delimited Strings
Post #873173
SQLRNNR
SQLRNNR
Posted Thursday, February 25, 2010 10:55 PM
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WayneS (2/25/2010)
The "correct" answer doesn't have a column in the where clause... how can that be SARGable?
I would have to agree here. The lack of a column in the where clause makes none of the answers correct.
Jason
AKA CirqueDeSQLeil
I have given a name to my pain...
MCM SQL Server 2008
SQL RNNR
Posting Performance Based Questions - Gail Shaw
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Post #873180
dduncan
dduncan
Posted Thursday, February 25, 2010 11:21 PM
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WayneS (2/25/2010)
The "correct" answer doesn't have a column in the where clause... how can that be SARGable?
Agreed. If the query is not RUNable then it can't be SARGable.
Post #873187
Sree Arjun Div
Sree Arjun Div
Posted Thursday, February 25, 2010 11:29 PM
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Agreed. ..The Answers was not properly printed wrong
A condition (or predicate) in a query is said to be
sargable
if the DBMS engine can take advantage of an index to speed up the execution of the query (using index seeks, not covering indexes). The term is derived from a contraction of Search Argument.
Post #873191
Fal
Fal
Posted Thursday, February 25, 2010 11:34 PM
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Hmmm. Either assume the pseudo code has a typo and choose the "right" answer, or take the question literally and choose the "wrong" answer. A 50/50 chance. I'm gonna have to start using dice to answer the QotD.
S.
Post #873192
Krishnraj
Krishnraj
Posted Friday, February 26, 2010 12:00 AM
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Yeah, I agree with CirquedeSQLeil, The lack of a column in the where clause makes none of the answers correct
Post #873203
SandyDB
SandyDB
Posted Friday, February 26, 2010 12:20 AM
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Non-sargable search arguments in the WHERE clause, such as "IS NULL", "<>", "!=", "!>", "!<", "NOT", "NOT EXISTS", "NOT IN", "NOT LIKE", and "LIKE '%500'" generally prevents (but not always) the query optimizer from using an index to perform a search.
How can where clause without column name can be SARGable while index can not be performed on this?
Please correct me in case I am wrong.
Post #873209
Kingston Dhasian
Kingston Dhasian
Posted Friday, February 26, 2010 12:23 AM
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I noticed it only now. The first option has a column in the Where Clause. It must be a typo for sure. Anyways i got it right
Kingston Dhasian
How to post data/code on a forum to get the best help - Jeff Moden
http://www.sqlservercentral.com/articles/Best+Practices/61537/
Post #873212
LythamsFinest
LythamsFinest
Posted Friday, February 26, 2010 12:40 AM
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SandyDB (2/26/2010)
Non-sargable search arguments in the WHERE clause, such as "IS NULL", "<>", "!=", "!>", "!<", "NOT", "NOT EXISTS", "NOT IN", "NOT LIKE", and "LIKE '%500'" generally prevents (but not always) the query optimizer from using an index to perform a search.
How can where clause without column name can be SARGable while index can not be performed on this?
Please correct me in case I am wrong.
The content of your reply looks remarkably like paragraph 2 of www.sql-server-performance.com/tips/t_sql_where_p2.aspx) .. so I'm not gonna argue with Brad MacGehee
Post #873221
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