Variables in SQL

Sagitt · 16-01-2013 06:59PM #1

Hi all,

I have a very simple sql query that uses date_from and date_to in WHERE clause. Every day I run my query I have to change dates. Is this possible to use variables instead of 'hard coded' dates?
I would like define one variable as today's date and second variable as today - 7 days. How do go around this?
I use Teradata sql, not sure exactly if that does make any difference for sql.

regards,
Sagitt

Mort5000 · 17-01-2013 05:19AM

Teradata Forum

Looks like there is a system calendar utility table/view there to help you out.

FSL · 17-01-2013 11:17AM

Use a combination of Datediff and Gedate in your query. i.e the difference in days between the date in the table and the current date is less than 7 will give you today and the previous 6 days use less than 8 if you want today and the previous seven days.

DublinWriter · 18-01-2013 05:52PM

There should be a date variable that you can use.

In Oracle it would be simply:

select * from table where sale_date >= sysdate -7 and sale_date <= sysdate

All DBMS have a current date variable that you should be able to use.

Variables in SQL

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