query join issue
От | Christine Penner |
---|---|
Тема | query join issue |
Дата | |
Msg-id | 19740415050200.9D651055B05FF2E5@edmwaa14.telusplanet.net обсуждение исходный текст |
Ответы |
Re: query join issue
|
Список | pgsql-general |
I have a query that joins 3 tables, TRAIN_MOD,TRAIN_COMP and TRAINING_COURSE, There could be many training_course records for each of the other tables. I want to get all records from the Train_mod and Train_comp table even if there are no training course records available. This is the query I'm trying and I get nothing. The data I'm trying this on has no training_course records but does have records in the other tables. What am I doing wrong. SELECT * FROM TRAIN_MOD LEFT OUTER JOIN TRAINING_COURSE ON TRAIN_MOD.TRM_SEQ_NO=TRAINING_COURSE.TC_TRM_SEQ LEFT OUTER JOIN TRAIN_COMP ON TRAIN_MOD.TRM_TRC_SEQ=TRAIN_COMP.TRC_SEQ_NO where TC_PUB_ED IS TRUE OR TC_SEQ_NO IS NULL Christine Penner Ingenious Software 250-352-9495 christine@ingenioussoftware.com
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