Wednesday, 28 September 2016

Re: [firebird-support] Left join derived table

 

W dniu 2016-09-28 09:04:07 użytkownik 'Marcin Bury' marcin.bury@studio-delfi.pl [firebird-support] <firebird-support@yahoogroups.com> napisał:
 

Hello All

I'd like to ask how to get below statement working:

SELECT A.FIELD_1, A.FIELD_2, D.FIELD_D1, D.FIELD_D2
FROM TABLE_A A
LEFT JOIN (SELECT FIRST 1 FIELD_D1, FIELD_D2 FROM TABLE_D D WHERE
D.FIELD_3 = A.FIELD_3 ORDER BY D.ID DESC) D ON (1=1)

Firebird complains that A.FIELD_3: Column does not belong to referenced
table.

I have the 'one to many' relation between TABLE_A and TABLE_D, and I
would like to join a record from TABLE_A with latest detail entry from
TABLE_D.
Maybe derived tables are not the right solution here.

Thanks
Marcin

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Hi,
 
SELECT A.FIELD_1, A.FIELD_2, D.FIELD_D1, D.FIELD_D2
FROM TABLE_A A
LEFT JOIN (SELECT FIRST 1 D.FIELD_D1, D.FIELD_D2, D.FIELD_3  FROM TABLE_D D 
 ORDER BY D.ID DESC) D ON D.FIELD_3 = A.FIELD_3
 
regards,
Karol Bieniaszewski

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