multiple date periods

Question

In my MySQL DB I've got one table storing date periods. Each period row has PSTART and PEND columns defining period start and period end dates. How to create a query which will check if one particular date is within any of these periods or not? Number of periods in not fixed!

Answer 1

SELECT * FROM periods WHERE [a date] BETWEEN PSTART AND PEND

Answer 2

Based on your question so far, this should give you all rows where date is between PSTART and PEND - you can modify depending on your requirements for inclusivity/exclusivity:

SELECT * FROM table WHERE date>=PSTART AND date<=PEND