Quoting Mischa <[EMAIL PROTECTED]>:

> SELECT  People.* FROM People 
> JOIN Widths
> ON    People.start = today - today % Widths.width
> AND   People.width = Widths.width

Yikes! I hit the SEND button one ohnosecend too fast.

(1) You still ALSO have to test:
... AND today between first_date and last_date

(2) On some SQL engines, it makes a different to how the engine can re-order the
nested loops, if you make the index (width,start) instead of (start,width).
Haven't tried on PG8 yet.
"Dreams come true, not free."

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