Hello everyone,
I have a problem with a few sql-queries because I have written the questions
with subselect statements and then will they not work on older MySQL DB:s. Can
any one help me to say haw to solve it without subselect!
Today looks the questions like this:
SELECT (SELECT count(SUB.S_ID) FROM SUB
LEFT JOIN SUBS ON SUBS.S_ID = SUB.S_ID)
/(SELECT COUNT(*) from SUB);
SELECT COUNT(SUBS.NEW_ID)+(SELECT COUNT(SUBS_D.NEW_ID)
FROM SUBS_D WHERE
SUBS.NEW_ID=SUBS_D.NEW_ID)
FROM SUBS WHERE SUBS.NEW_ID=1;
SELECT (SELECT count(*) from SUBS)-(SELECT count(SUBS.S_ID) FROM SUB LEFT JOIN
SUBS ON SUBS.S_ID = SUB.S_ID)+(SELECT count(*) FROM SUBS_D);
Another question is how do I do when I want to compare two tables, normally is
it no problem to get a list with rows that exist i both tables, but how do I do
if I want to to have the diffrence listed instead, the rows that only appears
in one of the tables?
Thanks in advance!
/Joppe
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