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Posted by Danielle on 12/28/05 01:46
Hello group-
I am having a problem where joined tables are returning too many rows.
Here is my scenario -
I am trying to create a temporary table from parts of three tables -
the important columns are:
a.id
a.tran_date
b.id
b.geo
c.holiday_date
c.geo
My query is like this
select a.col1, b.col1 from a
inner join b on a.id = b.id
inner join c on c.geo = b.geo
With the parameters that I have, I get 144 rows with just the join of
tables a & b.
However, when I add the join to table c, I get 720 rows - there are (of
course) 5 rows in table c where the geo is the same as the geo in table
b.
The reason for the join is that I need to know if a.tran_date =
c.holiday_date and holidays differ by GEO.
I don't want this added information. Thoughts on what I am doing wrong?
Please let me know if you need more information
Thanks-
Danielle
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