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(to_char(myDate,format) < myString) vs (myDate < to_date(myString, format)).

1
Hi all,
I am trying to optimize the queries in my application. Is there a performance difference between (to_char(myDate,format) < myString) and (myDate < to_date(myString, format)).

ex. Select * from myTable where (to_char(fieldDate, 'MM/DD/YYY') <= queryDate )

or Select * from myTable where (fieldDate <= to_date(queryDate, 'MM/DD/YYYY') )

assuming fieldDate is a date or timestamp field and queryDate is '01/01/2007', a string.

Also, does it matter if the to_date or to_char condition is listed before or after the string variable? Thank you for your help.
May 25 '07 #1
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