Sorry for my English. I'll try to explain better.

I've a table with the sales of a clients for each month, sometimes there are months without sales. For example: Adidas in...

It works perfectly, thank you very much. 😀

First of all, thank you for your time.

I know that this is a strange question, but It's a job that falling me suddelny.

There is an ugly database in mysql that...

Error.

Only a more questions, for maintenance issues.

How could manage all that stuff dinamically? That is, If the columns aren´t 3, but many of them, col1, col2, col3, ...., coln. Is...

Perfect!!!! 😀

Thank you very much, you have saved my life, 🙂