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Message Posted: Fri, 14 Jun 2002 @ 13:54:45 GMT

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From:   Dieter Nöth

Hi Jiri,

i don't know if it's really a bug, i would expect that behaviour (and MS SQL Server 2k works the same). Maybe you should ask in comp.databases (or comp.databases.theory IIRC) for that - probably Joe Celko will answer it, he's one of the guys who created ANSI SQL ;- )

To get the expected result set use a derived table:

select T_1.Id_1, T_1.Desc_1, V_2.V_Id_2, V_2.V_Desc_2
from T_1 left join (select
coalesce(Id_2,Id_2,0) as V_Id_2,
coalesce(Desc_2,Desc_2,'Error') as V_Desc_2
from T_2)V_2 on T_1.Id_1 = V_2.V_Id_2
order by 1;

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