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Join query if no referential integrity bw two tables

 
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kethepalli vagdevi

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Joined: 07 Sep 2006
Posts: 2

PostPosted: Thu Sep 07, 2006 12:41 pm    Post subject: Join query if no referential integrity bw two tables
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There are two tables .
Table 1 contains 3 fields say A (primary key), B, C
Table 2 contains 2 fields say X,Y - no primary key.

We need to join these two tables.
There is no referential integrity between these tables.
Tha values in field A(char 3) are same as values in first 3 characters of field X(char 8).
and we need to join , table 1 and table 2 based on field A (of size 3) with only first 3 characters of field X(of size 8) .

There are more than 1 record for field A in table 2(field X).

eg : Field A has value 'MNP'
Field X has value 'MNP00045'
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sarunkumaar

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Joined: 31 Aug 2006
Posts: 15
Location: Chennai, India

PostPosted: Thu Sep 07, 2006 1:37 pm    Post subject: Join Query
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Use substring to match the keys.

SELECT COLUMNS_NEEDED FROM TABLE01 T1, TABLE02 T2
WHERE SUBSTR(T2.X,1,3) = T1.A
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