Comparing date ranges

Question

In MySQL, If I have a list of date ranges (range-start and range-end). e.g.

10/06/1983 to 14/06/1983
15/07/1983 to 16/07/1983
18/07/1983 to 18/07/1983
         


        

Answer 1

Taking your example range of 06/06/1983 to 18/06/1983 and assuming you have columns called start and end for your ranges, you could use a clause like this

where ('1983-06-06' <= end) and ('1983-06-18' >= start)

i.e. check the start of your test range is before the end of the database range, and that the end of your test range is after or on the start of the database range.