How to break one row records into 3 row records

Question

I have two tables which consists of date records,
table1
first_date second_date
01-feb-10 01-mar-10
tabl2
new_date old_date
01-jan-10 01-aug-10
if first table dates falls between new_date and old_dates, i need to showit as three row records instead of1 row in table2

Answer 1

Hi,
1001383 wrote:
I have two tables which consists of date records,
table1
first_date second_date
01-feb-10 01-mar-10
tabl2
new_date old_date
01-jan-10 01-aug-10
if first table dates falls between new_date and old_dates, i need to showit as three row records instead of1 row in table2Do both first_date and second_date have to fall between old_date and new_date, or is it enough if either one does?
What do you want to see on those 3 rows?
Depending on your data and your requirements, here's one way:
WITH     cntr     AS
     SELECT     LEVEL     AS n
     FROM     dual
     CONNECT BY     LEVEL     <= 3
SELECT  t2.*
FROM          table2     t2
CROSS JOIN     cntr
WHERE   EXISTS (
'              SELECT  1
              FROM    table1     t1
              WHERE   t1.first_date     BETWEEN t2.old_date AND t2.new_date
              OR         t1.second_date     BETWEEN t2.old_date AND t2.new_date
;I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements) for both tables, and the results you want from that data.
Include examples of any special situations you need to handle, such as the same row in table2 matching several rows in table1.
See the forum FAQ {message:id=9360002}