Jeg gætter på, at du vil
UPDATE table1 cs
SET cs.abc = (SELECT tc.abc
FROM table2 cgl,
table3 tc
WHERE cgl.prd_id = tc.prd_id
AND cgl.prd_ver = tc.prd_ver
AND cgl.py_id = tc.py_id
AND cgl.typ_id = tc.tpy_id
AND cd.common_column = cgl.common_column)
WHERE EXISTS (SELECT 1
FROM table2 cgl,
table3 tc
WHERE cgl.prd_id = tc.prd_id
AND cgl.prd_ver = tc.prd_ver
AND cgl.py_id = tc.py_id
AND cgl.typ_id = tc.tpy_id
AND cd.common_column = cgl.common_column)
Opdatering:Bortset fra ændringerne i kolonne- og tabelnavnene, ser mit første svar ud til at fungere med de eksempeldata, du har sendt. Bemærk, at det altid er nemmere at sende DDL og DML, så vi kan reproducere dine tabeller og data i stedet for at få os til at konvertere dine data til DDL og DML.
Hvis jeg opretter dine tabeller og data
SQL> create table table1 (
2 prd_id number,
3 prd_ver number,
4 py_id number,
5 typ_id number,
6 column_used_for_update varchar2(10)
7 );
Table created.
SQL> begin
2 insert into table1 values( 1, 1, 1, 1, 'VALUE1' );
3 insert into table1 values( 2, 3, 4, 5, 'VALUE2' );
4 end;
5 /
PL/SQL procedure successfully completed.
SQL> create table table2 (
2 prd_id number,
3 prd_ver number,
4 py_id number,
5 typ_id number,
6 common_column varchar2(10)
7 );
Table created.
SQL> begin
2 insert into table2 values( 1, 1, 1, 1, 'A' );
3 insert into table2 values( 1, 1, 1, 1, 'B' );
4 insert into table2 values( 2, 3, 4, 5, 'C' );
5 end;
6 /
PL/SQL procedure successfully completed.
SQL> create table table3 (
2 common_column varchar2(10),
3 column_to_update varchar2(10)
4 );
Table created.
SQL> begin
2 insert into table3 values( 'A', null );
3 insert into table3 values( 'B', null );
4 insert into table3 values( 'C', null );
5 end;
6 /
PL/SQL procedure successfully completed.
SQL> commit;
Commit complete.
Juster derefter tabel- og kolonnenavnene fra mit første svar, det ser ud til, at opdateringen fungerer korrekt
SQL> ed
Wrote file afiedt.buf
1 UPDATE table3 t3
2 SET t3.column_to_update = (
3 SELECT t1.column_used_for_update
4 FROM table2 t2,
5 table1 t1
6 WHERE t1.prd_id = t2.prd_id
7 AND t1.prd_ver = t2.prd_ver
8 AND t1.py_id = t2.py_id
9 AND t1.typ_id = t2.typ_id
10 AND t3.common_column = t2.common_column)
11 WHERE EXISTS ( SELECT 1
12 FROM table2 t2,
13 table1 t1
14 WHERE t1.prd_id = t2.prd_id
15 AND t1.prd_ver = t2.prd_ver
16 AND t1.py_id = t2.py_id
17 AND t1.typ_id = t2.typ_id
18* AND t3.common_column = t2.common_column)
SQL> /
3 rows updated.
SQL> select * from table3;
COMMON_COL COLUMN_TO_
---------- ----------
A VALUE1
B VALUE1
C VALUE2