Re: Outer join problem

Neeraj,

It would be interesting to have a more complete functional description of these tables / fields and the functional intent of the query.

Having said that, you'll never get the 3rd row in the result with your query since that would require CHARGE.CODE to be null and also CHARGE.CODE=CODE.CODE to be true. Since that expression is never true, that's the basic reason for the behavior you are seeing.

You'll similarly have the same problem with comparisons of the other columns of table "charge".

Try this (just as a test) or use the non-standard (+) syntax if you wish:

SELECT payer.period, payer.cust, payer.ba, charge.ba,

       payer.ctrl_no, charge.code, code.cd_typ, charge.receiver   FROM payer LEFT JOIN charge

                    ON charge.period  = payer.period
                   AND charge.cust    = payer.cust
                   AND charge.ba      = payer.ba
                   AND charge.ctrl_no = payer.ctrl_no,
       outcharge,
       code,
       (SELECT *
          FROM control1
        UNION
        SELECT *
          FROM control2) tmp_control;

Regards... Jon

Jon Armstrong

<jain-neeraj_at_lycos.com> wrote in message news:30b5aacb.0406180835.55c88998_at_posting.google.com...
> Hi,
>
> We have a problem in our mobile calls billing software. To solve it, I
> need an outer join in a complicated query. Following are the
> simplified tables with sample data:
>
> create table CONTROL1 (CTRL_NO number(2));
> insert into CONTROL1 values (10);
>
> create table CONTROL2 (CTRL_NO number(2));
> -- does not have any data
>
> create table CODE (CODE number(2), CD_TYP number(2));
> insert into CODE values (20, 21);
>
> create table PAYER (PERIOD number(2), CUST number(2), BA number(2),
> CTRL_NO number(2));
> insert into PAYER values (1,1,1,10);
> insert into PAYER values (1,1,2,10);
> insert into PAYER values (1,1,3,10);
>
> create table CHARGE (PERIOD number(2), CUST number(2), BA number(2),
> CTRL_NO number(2), SEQ1 number(2), SEQ2 number(2), CODE number(2),
> RECEIVER number(2));
> insert into CHARGE values (1,1,1,10,4,5,20,99);
> insert into CHARGE values (1,1,2,10,4,6,20,90);
>
> create table OUTCHARGE (PERIOD number(2), CUST number(2), SEQ1
> number(2), SEQ2 number(2));
> insert into OUTCHARGE values (1,1,4,5);
> insert into OUTCHARGE values (1,1,4,6);
>
> QUERY is:
>
> SELECT PAYER.PERIOD, PAYER.CUST, PAYER.BA, PAYER.CTRL_NO,
> CHARGE.CODE, CODE.CD_TYP, CHARGE.RECEIVER
> FROM PAYER, CHARGE, OUTCHARGE, CODE,
> (select * from CONTROL1
> union select * from CONTROL2) TMP_CONTROL
> WHERE PAYER.CTRL_NO=TMP_CONTROL.CTRL_NO
> AND CHARGE.PERIOD(+)=PAYER.PERIOD
> AND CHARGE.CUST(+)=PAYER.CUST
> AND CHARGE.BA(+)=PAYER.BA
> AND CHARGE.CTRL_NO(+)=PAYER.CTRL_NO
> AND CHARGE.CODE=CODE.CODE
> AND OUTCHARGE.PERIOD=CHARGE.PERIOD
> AND OUTCHARGE.CUST=CHARGE.CUST
> AND OUTCHARGE.SEQ1=CHARGE.SEQ1
> AND OUTCHARGE.SEQ2=CHARGE.SEQ2;
>
> Output should be (3 rows):
> (1,1,1,10,20,21,99)
> (1,1,2,10,20,21,90)
> (1,1,3,10,null,null,null)
>
> When I use the above query, I get only the first 2 rows, not the
> third. What mistake am I doing?
>
> Thanks in advance.

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