Trying to convert the query below to a view. The problem is despite it working as a query when trying to save it as a view the database returns the error that the field tablealias.cmpname is duplicated. (Which it is and has to be)
So how to a refer to the same table more than once and get the data without getting the above error. (Basically it is looking up different addresses depending on the codes stored in mhdespatch table). Can I do this with a view, or do I have to create several views and link them together.
Thanks
Richard Postgresql 7.4.1,SuSE 8.1
Query Begins ==>
CREATE OR REPLACE VIEW public.test AS
SELECT mhdespatch.gdn, mhdespatch.date, mhdespatch.remarks, mhdespatch.sp_instruct1,
mhdespatch.sp_instruct2, mhdespatch.sp_instruct3, tbldelivery.cmpname,
tbldelivery.adds1, tbldelivery.adds2, tbldelivery.adds3, tbldelivery.town,
tbldelivery.county, tbldelivery.pcode, tbldelivery.country, tbldelivery.tel1,
mhdespatch.del_ref, tblsender.cmpname, mhdespatch.send_ref, tblhaulier.cmpname,
mhdespatch.haul_reg, mhdespatch.cov, tblhaulier.tel1
FROM mhdespatch
INNER JOIN tblfmna AS tblhaulier ON mhdespatch.haul_code = tblhaulier.code
INNER JOIN tblfmna AS tblsender ON mhdespatch.send_code = tblsender.code
INNER JOIN tblfmna AS tbldelivery ON mhdespatch.del_code = tbldelivery.code;
<=== Query Ends
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