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using Strings to query database??

 
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I have a simple question. Do I have to trim() the strings before using it in a select statement?
for example:
String thisString = request.getParameter("some");
thisString = thisString.trim();
.
.
.
or is it irrelevant??
 
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Yes we can do trim function before select
statement.This is very useful code also why because of not all database are not supported to trim function proprty.
 
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