Dnia 2004-02-03 07:28, Użytkownik Russell Shaw napisał:
Hi, I'm using postgresql 7.3.4 on debian. I get bad results from a two-table left outer join.
First table: select * from descriptions;
desc_id | description ---------+------------- 909097 | cap 107890 | resis 223940 | ic 447652 | electro (4 rows)
Second table: select * from parts;
part_id | desc_id | mounting | man_id ---------+---------+----------+-------- 2 | 107890 | SMD | 7 1 | 909097 | LEADED | 1 3 | 223940 | LEADED | 8 (3 rows)
Join:
SELECT parts.*, d.description, d.desc_id FROM parts p LEFT OUTER JOIN
^^^^^^^^^^^^^^^
You can't access "parts" here - you used table alias, so the only way to access it is using "p.*"
descriptions d ON p.desc_id=d.desc_id;
NOTICE: Adding missing FROM-clause entry for table "parts"
Rewrite your query and show your results.
Thanks, it works now:)
SELECT p.*, d.description, d.desc_id FROM parts p LEFT OUTER JOIN descriptions d ON p.desc_id=d.desc_id;
part_id | desc_id | mounting | man_id | description | desc_id
---------+---------+----------+--------+-------------+---------
2 | 107890 | SMD | 7 | resis | 107890
3 | 223940 | LEADED | 8 | ic | 223940
1 | 909097 | LEADED | 1 | cap | 909097
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