Update rows with a column

Question

hi
gurus
updating a row with a column
i have first table with 5 columns
id telephone, telex, mobile,email,santige
1 9123455 12 987 @ 12452
i have another second table having a columns like
id comm , commid
1 3245 1
1 23 2
1 786 3
1 we@ 4
1 122 5
the commid is
1-telephone 2-telex,3-mobile,4-email,5--santige
the problem is i want to update the second table with the data of first table
final data will comes like this
id comm , commid
1 9123455 1
1 12 2
1 987 3
1 @ 4
1 12452 5
please adjust the data below the columns (for view)

Answer 1

Something like
UPDATE table2 t2
   SET comm = (SELECT DECODE(t2.commid, 1, telephone,
                                        2, telex,
                                        3, mobile,
                                        4, email,
                                        5, santige)
                 FROM table1 t1
                WHERE t1.id = t2.id)should work.
CREATE TABLE table1 (
  id NUMBER,
  telephone VARCHAR2(100),
  telex     VARCHAR2(100),
  mobile    VARCHAR2(100),
  email     VARCHAR2(100),
  santige   VARCHAR2(100)
CREATE TABLE table2 (
  id     NUMBER,
  comm   VARCHAR2(100),
  commid NUMBER
INSERT INTO table1 VALUES( 1, 'telephone', 'telex', 'mobile', 'email', 'santige' );
BEGIN
  INSERT INTO table2 VALUES( 1, 'x', 1 );
  INSERT INTO table2 VALUES( 1, 'x', 2 );
  INSERT INTO table2 VALUES( 1, 'x', 3 );
  INSERT INTO table2 VALUES( 1, 'x', 4 );
  INSERT INTO table2 VALUES( 1, 'x', 5 );
END;
UPDATE table2 t2
   SET comm = (SELECT DECODE(t2.commid, 1, telephone,
                                        2, telex,
                                        3, mobile,
                                        4, email,
                                        5, santige)
                 FROM table1 t1
                WHERE t1.id = t2.id);
SQL> SELECT * FROM table2;
        ID COMM                COMMID
         1 telephone                1
         1 telex                    2
         1 mobile                   3
         1 email                    4
         1 santige                  5Justin
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