Question

I need to create a MySQL query that generates 4 rows for each row in the table it references. I need some of the information in those rows to repeat and some to be different. In the table each row stands for one day. I need to break the day up in 6 hour increments, hence the four rows for each entry. I need to create one column which for each day will have ’12AM’, ‘6AM’, ’12PM’, and ‘6PM’ values and another column will have the corresponding numeric values calculated for those entries.

Thanks a lot in advance and I will really appreciate any help on this.

Answer 1

What the query should do and calculate with the values is a bit vague, but simply generating four rows for each row in another table is straight foward:

Select ...
From Table
    Cross Join  (
                Select '12 AM'
                Union All Select '6 AM'
                Union All Select '12 PM'
                Union All Select '6 PM'
                ) As Times