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JDBC and Relational Databases
SQL Trim Function
Joined: Nov 13, 2008
May 18, 2009 00:57:56
Hi it is a good practise to apply the SQL trim function on all the VARCHAR2 column used in the where clause? For eg.
select * from table A where trim(B) = 'test'
Please advise, thanks.
Joined: Mar 22, 2005
May 18, 2009 01:32:37
That depends on whether any whitespace might be significant for the application's purposes or not.
Joined: Dec 20, 2006
May 18, 2009 03:55:10
On several databases, this has a performance impact if the field is indexed. Yorur database might stop using the index if you wrap a function around your field.
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