I wanted to display the multiple rows in one row but column should be diff

Question

Hi
Could any body help me regarding this query how to write to get the multiple rows in one row.
eg.
i have one table tab1(eno number,ename varchar2,uid1 varchar2,uid2 varchar2,uid3 varchar4)
but when i am runing the query I am getting multiple record against one eno number because of uid1,uid2,uid3
suppose value of table is
eno ename uid1 uid2 uid3
1 a u1
1 a u2
1 a u3
when i am quering it is coming same as above but I want in one row
eno ename uid1 uid2 uid3
1 a u1 u2 u3
can any onle help me how to write the query for this requirement.
thanks
saif

Answer 1

which is hard coded in my code? Here another approach, but fail for c as there is no information for the value of a column: does 1 in u1 means col 1, etc.
/* Formatted on 2012/05/29 16:29 (Formatter Plus v4.8.8) */
WITH t AS
     (SELECT 1 col1, 'a' col2, 'u1' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'a' col2, 'u2' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'a' col2, 'u3' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'b' col2, 'u1' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'b' col2, 'u3' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'b' col2, 'u2' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'c' col2, 'u1' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'c' col2, 'u3' col3
        FROM DUAL)
SELECT   xx.col1, xx.col2, MAX (DECODE (xx.rn, 1, col3)) AS uid1, MAX (DECODE (xx.rn, 2, col3)) AS uid2,
         MAX (DECODE (xx.rn, 3, col3)) AS uid3
    FROM (SELECT t.col1, t.col2, t.col3, ROW_NUMBER () OVER (PARTITION BY col1, col2 ORDER BY col3) rn
            FROM t) xx
GROUP BY col1, col2;output:
COL1     COL2     UID1     UID2     UID3
1     a     u1     u2     u3
1     b     u1     u2     u3
1     c     u1     u3
Edited by: ʃʃp on May 29, 2012 2:30 AM