Non Clustered Index to increase performance

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Hi, I'm selecting data from table depends upon value of one or two columns.

eg. select Column_A,Column_B from tbl_name where Column_C=@value

plz help me to apply non clustered index on this

Posted 5-Jul-13 0:53am

Dipali_Wagh

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Mukesh Ghosh · Accepted Answer · 2013-07-05T01:01:00

Solution 2

Check bellow link for help

Clustered and Non-Clustered Index in SQL 2005[^]

Posted 5-Jul-13 1:01am

Mukesh Ghosh

Comments

Dipali_Wagh 5-Jul-13 7:16am

but tell me if select query depends upon two columns then what to do?
can u give me example?

Mukesh Ghosh 5-Jul-13 7:23am

CREATE TABLE dbo.foo1(A INT, B INT, C INT);
CREATE NONCLUSTERED INDEX foo1x ON dbo.foo1(B, C) INCLUDE(A);
SELECT A
FROM (
SELECT A, ROW_NUMBER() OVER (PARTITION BY B ORDER BY C DESC) RN
FROM dbo.foo1
) q
WHERE rn = 1;

Dipali_Wagh 6-Jul-13 1:44am

thanks, its working