Returns the timestamp resulting from adding/subtracting the specified number of hours to the specified timestamp
TIME_ADD (timestamp, hours)
An expression producing timestamp and an expression producing a number to be added or subtracted (if the number is negative) to the timestamp
Timestamp: the timestamp with the given number of hours added (subtracted if negative).
IF TIME_ADD (Account.OpeningTime, 4) = 07/04/2004 12:00 THEN ...