How mysql order the rows with same values

Question

In my database I have some records where I am sorting by what happens to be the same value:

| col1 | timestamp              |
| row1 | 2011-07-01 00:00:00            


        

Answer 1

The answer is: No, the order won't be consistent. I faced the same issue and solved it by adding another column to the order section. Be sure that this column is unique for each record like 'ID' or whatever it is.

In this case, you must add the 'ID' field to your table which is unique for each record. You can assign it 'AI' (auto increment) so that you are not going to deal with the maintenance.

After adding the 'ID' column, update the last part of your query like:

SELECT mt.*
FROM my_table mt
ORDER BY mt.timestamp ASC, mt.id DESC