Question

select playing_time from video order by playing_time desc;  

The column type of playing_time is varchar(25)
Sample Data

01:05:22  
21:08  
07:52  
04:31

The query dont work it does not order by highest time
how i can solve this problem ?

Answer 1

I would go for changing the column type used for storing the duration from varchar to unsigned int and hold the length in seconds. This way you know exactly what you have stored there. Right now, you have to treat differently the (at least) 2 formats you have there: (21:08 and 01:05:22)