Combining multiple rows to singe row thru SQL Stmt

Question

Hello,
I am trying to combine values returned from multiple row into one row,
thru inner/outer sql or any optimal way.
In the example i would like to have First name, Last name, email and phone to be
returned as a single row.
create table TEMP_AAAAA
  FIRST_NAME VARCHAR2(25),
  LAST_NAME  VARCHAR2(25),
  CON_METHOD VARCHAR2(25),
  CON_VALUE  VARCHAR2(25)
INSERT INTO TEMP_AAAAA VALUES('TOM','MAC','EMAIL','[email protected]');
INSERT INTO TEMP_AAAAA VALUES('TOM','MAC','PHONE','12345');Any suggestion in doing it thru sql stmt.
I have done this thru pl/sql, wondering if this could be achieve thru single SQL Stmt
DECLARE
v_FIRST_NAME  VARCHAR2(25);
v_SECOND_NAME VARCHAR2(25);
v_EMAIL       VARCHAR2(25);
v_PHONE       VARCHAR2(25);
BEGIN
v_FIRST_NAME := NULL;
v_SECOND_NAME := NULL;
v_EMAIL := NULL;
v_PHONE := NULL;
FOR IMPL_CUR IN(SELECT * FROM TEMP_AAAAA ORDER BY CON_METHOD DESC)
LOOP
        IF v_FIRST_NAME IS NULL
        THEN
           v_FIRST_NAME := IMPL_CUR.FIRST_NAME;
        END IF;
        IF v_SECOND_NAME IS NULL
        THEN
           v_SECOND_NAME := IMPL_CUR.LAST_NAME;
        END IF;  
        IF v_PHONE IS NULL AND IMPL_CUR.CON_METHOD = 'PHONE'
        THEN
           v_PHONE := IMPL_CUR.CON_VALUE;
        END IF;
        IF v_FIRST_NAME = IMPL_CUR.FIRST_NAME AND
           v_SECOND_NAME = IMPL_CUR.LAST_NAME AND
           length(v_PHONE) > 0
        THEN
          IF v_EMAIL IS NULL AND IMPL_CUR.CON_METHOD = 'EMAIL'
          THEN
             v_EMAIL := IMPL_CUR.CON_VALUE;
             EXIT;
          END IF;       
        END IF;
END LOOP;
         DBMS_OUTPUT.put_line('firstName...:' || v_FIRST_NAME);    
         DBMS_OUTPUT.put_line('lastName....:' || v_SECOND_NAME);    
         DBMS_OUTPUT.put_line('PHONE.......:' || v_PHONE);
         DBMS_OUTPUT.put_line('EMAIL.......:' || v_EMAIL);
END;

Answer 1

Hi Ludy,
Following query should work -
P.S. - I have added records for one more person with first name as 'TOM1' and last name as 'MAC1' for testing purpose. Given inserts for these 2 records as well.
Connected to Oracle Database 11g Release 11.2.0.1.0
SQL>
SQL> INSERT INTO TEMP_AAAAA VALUES('TOM1','MAC1','EMAIL','[email protected]');
1 row inserted
SQL> INSERT INTO TEMP_AAAAA VALUES('TOM1','MAC1','PHONE','12345');
1 row inserted
SQL>
SQL>
SQL> SELECT t.first_name
  2        ,t.last_name
  3        ,MAX(decode(t.con_method, 'PHONE', t.con_value, NULL)) phone
  4        ,MAX(decode(t.con_method, 'EMAIL', t.con_value, NULL)) email
  5    FROM temp_aaaaa t
  6   GROUP BY t.first_name
  7           ,t.last_name
  8  /
FIRST_NAME     LAST_NAME   PHONE   EMAIL
TOM            MAC         12345   [email protected]
TOM1           MAC1        12345   [email protected]
SQL> Hope this helps.
Cheers,
- Anirudha
Edited by: Anirudha Dhopate on Nov 10, 2011 9:12 PM