Question

In MySQL, is there a difference between those 2 queries?

SELECT * FROM .... ORDER BY Created,Id DESC 

and

SELECT * FROM .... ORDER BY Created DESC, Id DESC

Desired behaviour: order (descending ) by “Created” ( a timestamp) but when two items have the same “Created” value then fall back to ordering ( desc ) using the Id.

Answer 1

Yes, there is a difference. The default order is ascending, so:

SELECT * FROM .... ORDER BY Created,Id DESC 

Will order by Created ascending, and then Id descending

SELECT * FROM .... ORDER BY Created DESC, Id DESC

Will order by Created descending, and then Id descending