Simple left-join doesn't work. error with: Unknown column

Question

Hi guys,
can anyone assist on this simple query:
SELECT D.* , SUM( TD.debit_amount), SUM(TAP.amount)
FROM debit AS D, transaction_debit AS TD
LEFT JOIN TA_PAYMENTS AS TAP ON D.debit_id=TAP.debit_id
WHERE D.debit_id = TD.debit_id
GROUP BY TD.debit_idThe error message I receive is:
#1054 - Unknown column 'D.debit_id' in 'on clause' I'm trying to relate 3 tables (debit, transactions-debit and ta_payment), some payment may not exist so therefore i use left join.
thanks for any pointers

Answer 1

SELECT D.* , SUM( TD.debit_amount), SUM(TAP.amount)
FROM debit AS D, transaction_debit AS TD
LEFT JOIN TA_PAYMENTS AS TAP ON
D.debit_id=TAP.debit_id
WHERE D.debit_id = TD.debit_id
GROUP BY TD.debit_id
I'm trying to relate 3 tables (debit,
transactions-debit and ta_payment), some payment may
not exist so therefore i use left join.You are trying to mix "the older join syntax", with the join condition in the where-clause, with "the new join syntax", with the join condition in the "on-clause", which I think is causing trouble.
How about using only "the new syntax":
SELECT D.* , SUM( TD.debit_amount), SUM(TAP.amount)
FROM debit AS D JOIN transaction_debit AS TD on (D.debit_id = TD.debit_id)
     LEFT JOIN TA_PAYMENTS AS TAP ON (D.debit_id=TAP.debit_id)
GROUP BY TD.debit_idDoes that help?