MySQL select formatted date from millisecond field

Question

I have a column in a MySQL database that contains a date as milliseconds (epoch). I want to build an SQL query that formats the date as something human readable (day, month, yea

Answer 1

CREATE DEFINER=`root`@`localhost` FUNCTION `ConvertTimeDelta`(duration int) RETURNS 
varchar(20) CHARSET utf8mb4
    DETERMINISTIC
BEGIN
 DECLARE time_delta VARCHAR(20);
 DECLARE date_format VARCHAR(20);
 SET date_format = IF (duration > 3599999, '%H:%i:%s', '%i:%s');
 SET time_delta = TIME_FORMAT(SEC_TO_TIME(duration/1000), date_format);
 RETURN time_delta;
END

For example select ConvertTimeDelta(4800240) result = 01:20:00 select ConvertTimeDelta(35076) result = 00:35