HELP! Query Using View to denormalize data

Question

Help!!!
Below are two logical records of data that have been denormalized so that each column is represented as a different record in the database
RECORD NUMBER, COL POSITION, VALUE
1, 1, John
1, 2, Doe
1, 3, 123 Nowhere Lake
1, 4, Tallahassee
1, 5, FL
2, 1, Mary
2, 2, Jane
2, 3, 21 Shelby Lane
2, 4, Indianapolis
2, 5, IN
I need to write a view to return the data values in this format:
John, Doe, 123 Nowhere Lake, Tallahassee, FL
Mary, Jane, 21 Shelby Lane, Indianapolis, IN
I REALLY need this as soon as possible! Someone PLEASE come to my rescue!!!

Answer 1

Assuming that the other table has one record per record_num in the first table, then you could do something like:
SQL> SELECT * FROM t1;
RECORD_NUM DATE_COL
         1 17-MAR-05
         2 16-MAR-05
SQL> SELECT a.record_num, col1, col2, col3, col4, col5, t1.date_col
  2  FROM (SELECT record_num,
  3               MAX(DECODE(col_position, 1, value)) Col1,
  4               MAX(DECODE(col_position, 2, value)) Col2,
  5               MAX(DECODE(col_position, 3, value)) Col3,
  6               MAX(DECODE(col_position, 4, value)) Col4,
  7               MAX(DECODE(col_position, 5, value)) Col5
  8        FROM t
  9        GROUP BY record_num) a, t1
10  WHERE a.record_num = t1.record_num;
RECORD_NUM COL1  COL2  COL3              COL4            COL5  DATE_COL
         1 John  Doe   123 Nowhere Lake  Tallahassee     FL    17-MAR-05
         2 Mary  Jane  21 Shelby Lane    Indianapolis    IN    16-MAR-05If your second table is structured like the first table then something more like:
SELECT record_num,
       MAX(DECODE(source,'Tab1',DECODE(col_position, 1, value))) Col1,
       MAX(DECODE(source,'Tab1',DECODE(col_position, 2, value))) Col2,
       MAX(DECODE(source,'Tab1',DECODE(col_position, 3, value))) Col3,
       MAX(DECODE(source,'Tab1',DECODE(col_position, 4, value))) Col4,
       MAX(DECODE(source,'Tab1',DECODE(col_position, 5, value))) Col5,
       MAX(DECODE(source,'Tab2',DECODE(col_position, 1, value))) T2_Col1,
       MAX(DECODE(source,'Tab2',DECODE(col_position, 2, value))) T2_Col2
FROM (SELECT 'Tab1' source, record_num, col_position, value
      FROM t
      UNION ALL
      SELECT 'Tab2' source, record_num, col_position, value
      FROM t1)
GROUP BY record_numBy the way, I can't say I am enamoured of your data model.
John