Pivot

Question

Hi,
I have tables like this:
Table1:
Year | ID | col1
2007 | 1 | x
Table2:
Year | ID | Date
2007 | 1 | dd/mm/yyyy
2007 | 1 | dd/mm/yyyy
Now I need to get the result like this in one row:
Year | ID | Date1 | Date2
2007 | 1 | dd/mm/yyyy| dd/mm/yyyy
For each year there are two different dates only so I need Date1 and Date2 only.
How to get the result from two rows into one row. I searched for Pivot but all examples are saying like this:
select year, id,
max(decode(expression, true,false)) like this only but in my case I don't have that expression type.
Thanks in advance

Answer 1

Something along these lines, if you know how many rows there are:
SELECT
    YEAR,
    ID
    MAX( CASE WHEN RN=1 THEN DATE END ) AS DATE1,
    MAX( CASE WHEN RN=2 THEN DATE END ) AS DATE2,
    MAX( CASE WHEN RN=3 THEN DATE END ) AS DATE3,
    MAX( CASE WHEN RN=4 THEN DATE END ) AS DATE4
FROM
    SELECT YEAR, ID, DATE, ROW_NUMBER() OVER (PARTITION BY YEAR, ID ORDER BY DATE ) AS RN FROM TABLE 2
GROUP BY
    YEAR,
    ID;