Left Join two dependent tables

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February 17th, 2012, 05:58 AM

iwosz

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Join Date: Aug 2009

Location: Poland

Posts: 11

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Left Join two dependent tables

Hi, I have some problem with joining two dependent tables... I need to do this:

Code:

SELECT 
t1.Id_t1
coalesce(t3.Data,'No data') AS Data
FROM t1
LEFT JOIN t2 ON t2.Id_t2 = t1.Id_t1
LEFT JOIN t3 ON t3.Id_t3 = t2.Id_t2

I have an error "numeric overflow" when there is no t2 table record... so in that case how to Select 'No data' from t3 where there is no t2 record? I mean 't3.Id_t3 = t2.Id_t2' shouldn't be taken when there is no t2 record... how to do this?

Thanks for any help!

February 20th, 2012, 12:58 AM

costin_mentor

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Join Date: Jan 2007

Posts: 31

Time spent in forums: 13 h 12 m 34 sec
Reputation Power: 7

What type is t3.data?
If is not character than that is causing the error.

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