Help with update statement

Question

Create table temp_sibs as
(select 1701 sib_1, 1702 sib_2 from dual
union all
select 1171,1172 from dual
union all
select 1701,1172 from dual
union all
select 1171,1174 from dual
union all
select 1173,1176 from dual
union all
select 2001,2004 from dual
union all
select 2001,2006 from dual
union all
select 2002,2006
from dual)
create table temp_sib_data as
(select 111 pid, 1701 sibid, 5 amt from dual
union all
select 111 pid, 1176 sibid, 5 from dual
union all
select 222 pid, 2006 sibid, 5 from dual
union all
select 333 pid, 2001 sibid, 5 from dual
union all
select 333 pid, 2002 sibid, 5 from dual
union all
select 333 pid, 1171 sibid, 5 from dual
First table is a lookup table that defines relationships sib_1 is related to sib_2
Second table consists of a column pid and column sibid which is either sib_1 or sib_2
The user would pass parameter pid and sibid and I want to update all the related rows with any matching sibid to 0.
It is like 1701 matches with 1702 and 1701 matches with 1174 so indirectly 1701 and 1174 match...and 1171 matches because
1171 matches with 1174
so all 1701,1702,1171,1172, 1173,1174,1176 match (indirectly with each other)
So for example if the user passes 333 pid and 2001 rows with 333,2001 and 333,2002 should update the amt to 0
and if the user passes 111 and 1176 than 1st 2 rows should be updated to 0.

Answer 1

Hi,
try this:
DEFINE PID='333'
DEFINE sibid='2001'
-- SELECT is only for test.
-- Replace SELECT with: UPDATE TEMP_SIB_DATA SET AMT = 0
SELECT * FROM TEMP_SIB_DATA  
WHERE  PID = &PID   AND  SIBID IN (
       WITH TEMP AS(
            SELECT SIB_1, SIB_2 FROM TEMP_SIBS
               START WITH     SIB_1 = &&SIBID   OR  SIB_2 = &&SIBID
               CONNECT BY NOCYCLE      PRIOR SIB_2 = SIB_1  
                                   OR  PRIOR SIB_1 = SIB_2  
                                   OR  SIB_2 = PRIOR SIB_2  
                                   OR  SIB_1 = PRIOR SIB_1
        SELECT SIB_1 FROM TEMP
        UNION ALL
        SELECT SIB_2 FROM TEMP
);For pid=333 and sibid=2001 it returns desired records for update:
PID                    SIBID                  AMT                   
333                    2001                   5
333                    2002                   5For pid=111 and=1176 it returns one row - 1176 matches only with 1173 and 1173 doesn't match with any other rows,
so only 5th row, not first 2, should be updated ... maybe I missed something ?
PID                    SIBID                  AMT
111                    1176                   5