MySQL Select : where time is greater then and less than time

Question

I have a function that accepts two time parameters: $start_time, $end_time each parameter is define as time in php as

$start_time          


        

Answer 1

You want TIME(), not HOUR().

SELECT * FROM cdr_table 
WHERE OwnerUserID = '$_SESSION[user_id]'
  AND GatewayID = $gateway_id
  AND DATE(Dialed) = $date_sql
  AND Dialed != 0
  AND TIME(StartTime) BETWEEN '$start_time' AND '$end_time'

Also, I'd strongly suggest escaping all variables you're embedding in SQL code with mysql_real_escape_string() or equivalent, even if you're sure there's nothing harmful in them, just to make it a habit.

Note that a query like this may be intrinsically inefficient, since it cannot make use of indexes on the StartTime column. If there are a lot of potentially matching rows in the table, it could be a good idea to denormalize your table by creating a separate column storing only the time part of the StartTime and setting up an index on it (possibly combined with other relevant columns).