Get time from a varchar(100) type with (HH:MM AM/PM) format

Question

How to convert the string ("RD/OT 07:30") to time. I just know how to convert ("07:30 AM") to time. This code below is giving me a blank data.

 $id = strtoupper($_POST['id']);
    $query = mysql_query("SELECT STR_TO_DATE('RD/OT 07:30','%x %h:%i')  as ScheduleIn  FROM tbl_uploadedschedule") or die(mysql_error());
    $res =   mysql_fetch_assoc($query);
    $r = $res['ScheduleIn'];
    return($r);

Answer 1

You can use STR_TO_DATE(str,format) function to convert time format:

SELECT STR_TO_DATE(`field_name`, '%h:%i %p')
FROM `table_name`
# this will convert '7:30 AM' to '07:30:00'

If whole DATETIME format is outputed, you can use TIME(expr) function to get only TIME part.

Demo (don't know why sqlfiddle is ignoring TIME() function; it works on localhost).

Answer 2

Thanks for the answers, now i get the STR_TO_DATE(), the code:

STR_TO_DATE('loginTime', '%h:%i %p')  as Cast 

is wrong because it reads the 'loginTime' as string which is an illegal time format. And the right syntax is:

 STR_TO_DATE(loginTime, '%h:%i %p')  as Cast 

without the single quotation in the column name. Horray !