On Tue, Jan 08, 2008 at 05:47:53PM +0100, Aristotle Pagaltzis wrote: > * Gerry Lawrence <gwlp...@gmail.com> [2008-01-08 17:40]: > > It's..... something altogether different..... > > > > mysql> select * from foobar where test123 = NULL; > > Err, that's not how NULL works in SQL. You don't compare things > to NULL, it's not a value. It's the absence of a value. > > What I'm talking about is this: > > mysql> CREATE TEMPORARY TABLE test ( d DATE NOT NULL ); > Query OK, 0 rows affected (0.04 sec) > > mysql> INSERT INTO test VALUES (0000-00-00);
It doesn't make a difference in this case, but 0000-00-00 isn't what you think it is. At least, it's not a date in YYYY-MM-DD format. It's just equal to 0 - 0 - 0 == 0. Abigail
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