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Join condition with date ranges

Join condition with date ranges

I have two tables I need to join to an invoice table.  

There are 4 primary keys on the invoice table:
account_num   upc      sales_id   date
10            001005   356        04/01/2009

The other two tables, discount and promotion, describe specific incentives that are in place.  The structure of these tables is as follows:

account_num   upc      sales_id   begin_date   end_date
10            001005   356        01/01/2009   05/31/2009

I'm trying to compare these feilds based on the date of the sale:

invoice.price, discount.price - promotion.price

My problem is I am unsure of how to join the invoice table given I have a date range rather than a list of dates that a particular promotion/discount would be in place.

Thanks in advance!

RE: Join condition with date ranges


How about:


...WHERE tab1.dt between tab2.begin_date and tab2.end_date...
Without more information about your join, that's the best suggestion we can make.

BTW, "date" (in your tab1) would not be a legal column name since "date" is an Oracle keyword.

(aka Dave of Sandy, Utah, USA)
[I provide low-cost, remote Database Administration services:]
"Beware of those that seek to protect you from harm or risk. The cost will be your freedoms and your liberty."

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