Hi,
I have two tables:
whenever I tried doing this select, mysql would hang
indefinitely trying to resolve it or at least took
toooo long I would rather shutdown the whole machine.
SELECT m.username, m.class, u.password
FROM masterlist m, user u
WHERE m.class <> '' LIMIT 20;
However, when I include "u.username = m.username" in
the WHERE field, it immediately produces the result
in 0.0x seconds.
Why does it hang on the 1st case? was it because there
were cases wherein a row in masterlist is not present
in user list that's causing it to croak?
Jaime
mysql> describe masterlist;
+----------+----------------------+
| Field | Type |
+----------+----------------------+
| username | char(8) |
| class | char(8) |
+----------+----------------------+
mysql> describe user;
+------------+--------------+
| Field | Type |
+------------+--------------+
| username | varchar(20) |
| password | varchar(20) |
+------------+--------------+
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