Joe Yoder wrote:
> I asked this question earlier without the Jobs component. I now
understand how to handle that one with a join but haven't figured out
how to join a join. As before this code gives me a single record but I
need one for the case where there is no Typ2.
> TIA - Joe Yoder
>
> CREATE CURSOR Family (Id I)
> CREATE CURSOR Members (Parent I, Type C(1), Jcode C(1))
> CREATE CURSOR Jobs (Code C(1), Desc C(1))
>
> INSERT INTO Family (Id) VALUES (1)
> INSERT INTO Family (Id) VALUES (2)
> INSERT INTO Members (Parent, Type, Jcode) VALUES (1, 'a', '1')
> INSERT INTO Members (Parent, Type, Jcode) VALUES (1, 'b', '2')
> INSERT INTO Members (Parent, Type, Jcode) VALUES (2, 'a', '3')
> INSERT INTO Jobs (Code, Desc) VALUES ('1', 'A')
> INSERT INTO Jobs (Code, Desc) VALUES ('2', 'B')
> INSERT INTO Jobs (Code, Desc) VALUES ('3', 'C')
>
> SELECT Family.Id, M1.Type as Typ1, M2.Type as Typ2, J1.Desc as Job1,
J2.Desc as Job2;
> FROM Family, Members as M1, Members as M2, Jobs as J1, Jobs as J2;
> WHERE Family.Id = M1.Parent AND M1.Type = 'a';
> AND Family.Id = M2.Parent AND M2.Type = 'b';
> AND J1.code = M1.Jcode;
> AND J2.code = M2.Jcode
Joe,
You'll need to use a LEFT JOIN instead of the implied INNER JOIN syntax
you've used. Also, avoid headaches later on and don't use field names
like DESC, as that's a SQL keyword (for DESCENDING). Finally, I suggest
using the explicit JOIN syntax (INNER JOIN, LEFT JOIN, RIGHT JOIN, etc.)
for better clarity.
Cheers,
--Michael
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