Joe Yoder wrote:
> Here is the code I've been trying to reduce to a single SQL select. It works
> fine as is but I'm trying to understand if there is a way to do it in a
> single statement. Perhaps this is already the simplest approach?
>
> 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), Jdesc 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, Jdesc) VALUES ('1', 'A')
> INSERT INTO Jobs (Code, Jdesc) VALUES ('2', 'B')
> INSERT INTO Jobs (Code, Jdesc) VALUES ('3', 'C')
>
> SELECT * FROM Members LEFT JOIN Jobs ON Jcode == Code INTO CURSOR MC
>
> SELECT Family.Id, M1.Type as Typ1, M2.Type as Typ2, M1.Jdesc as Job1,
> M2.Jdesc as Job2;
> FROM Family LEFT JOIN MC as M1 ON Id == M1.Parent AND M1.type = 'a';
> LEFT JOIN MC as M2 ON Id == M2.Parent AND M2.type = 'b'
>
UNTESTED :
SELECT Family.Id, M1.Type as Typ1, M2.Type as Typ2, M1.Jdesc as Job1, M2.Jdesc
as Job2;
FROM Family ;
LEFT JOIN (;
SELECT * ;
INTO CURSOR MC;
FROM Members ;
LEFT JOIN Jobs ;
ON Jcode == Code ;
) M1 ;
ON Id == M1.Parent AND M1.type = 'a';
LEFT JOIN (;
SELECT * ;
INTO CURSOR MC;
FROM Members ;
LEFT JOIN Jobs ;
ON Jcode == Code ;
) M2 ;
ON Id == M2.Parent AND M2.type = 'b'
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