MySQL how to fill missing dates in range?

Question

I have a table with 2 columns, date and score. It has at most 30 entries, for each of the last 30 days one.

date      score
-----------------
1.8.2010  19
2         


        

Answer 1

You can accomplish this by using a Calendar Table. That's a table which you create once and fill with a date range (e.g. one dataset for each day 2000-2050; that depends on your data). Then you can make an outer join of your table against the calendar table. If a date is missing in your table, you return 0 for the score.