Re: query join issue
От | Christine Penner |
---|---|
Тема | Re: query join issue |
Дата | |
Msg-id | 19740413172840.0ED11274B471A32B@edmwaa11.telusplanet.net обсуждение исходный текст |
Ответ на | Re: query join issue (Raymond O'Donnell <rod@iol.ie>) |
Список | pgsql-general |
I decided to approach this a different way. Not worth the time to figure out. I get all records from all tables and put them together in the program using this. Thanks for your help. Christine At 12:20 PM 16/09/2010, you wrote: >On 16/09/2010 18:33, Christine Penner wrote: >>Training Course >>tc_seq_no (primary key) >>tc_trm_seq (foreign key to train_mod table) >>... and some other title, desc etc fields >> >>train_mod >>trm_seq_no (primary key) >>trm_trc_seq (foreign key to train_comp table) >>.. and title etc fields >> >>train_comp >>trc_seq_no (primary key) >>.. and title etc fields > >[snip] > >>>>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 > >Hi Christine, > >I can't see it either, and without any data to try it on I'm really >only guessing.... > >Try removing the WHERE clause and see if you get any rows back. > >Also, try each join separately - just two tables at a time - and see >what happens. > >Hope this helps.... > >Ray. > > >-- >Raymond O'Donnell :: Galway :: Ireland >rod@iol.ie
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