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Option of LIKE Keyword

Author

Topic

amirs
Constraint Violating Yak Guru

260 Posts

Posted - 2009-10-05 : 04:35:36

Dear Member
i have write a select query to search a record to use like keyword of one colomn.in this colom lendth is 10 char
i have provide a parameter of searching only two charater
in this table mare than 10,00000 records. so the search result is very slow. so any other option to searching a record to replacing 'like' word in query
i have write same like following query
select * from tabel where col like %'AB'%

so plz send any other optiion to search result to same like keyword

thanks is advance

senthil_nagore
Master Smack Fu Yak Hacker

1007 Posts

Posted - 2009-10-05 : 05:17:23

Try like this..

select * from table_name where charindex('as',col_name)>0

Put a non-clustered index to the search column if not.

Senthil.C
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http://senthilnagore.blogspot.com/

Lamprey
Master Smack Fu Yak Hacker

4614 Posts

Posted - 2009-10-05 : 12:15:39

quote:
Originally posted by senthil_nagore

Try like this..

select * from table_name where charindex('as',col_name)>0

Put a non-clustered index to the search column if not.

That is way to do the query without using a LIKE clause. But, that is not going to be any faster than a LIKE clause. Neither can use an index when searching for a text in the middle of text like that. Hence, the poor performance.

I don't have much experience with Full Text Indexing, but that might be an option for you..?

X002548
Not Just a Number

15586 Posts

Posted - 2009-10-05 : 12:43:47

Please post the DDL with the indexes...

If you can lose the leading %, that would help

But I guess you'll need it


DECLARE @t99 table(col1 varchar(10))

INSERT INTO @t99(Col1)
SELECT 'AB34567890' UNION ALL
SELECT '12AB567890' UNION ALL
SELECT '12345678AB' UNION ALL
SELECT 'XXX4567890' UNION ALL
SELECT '12XXX67890' UNION ALL
SELECT '1234567XXX'


SELECT * FROM @t99 WHERE Col1 LIKE 'AB%'

Brett

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