How do I automatically calculate the difference between two dates?
Before you yell, I know I am cross-posting, but I guess this question relates to both ASP and SQL.
I am building a database that users will update.
I have a table named "products".
Every product has a shelf life of 3 years and expires exactely at the end of the 3rd year.
Here is my table:
Productid ---- int
productName ---- varchar
manufacture_date ----- datetime default (getdate)
Expire_date ----- datetime
What I want is this, whenever a product is entered, the defualt date is the date the entry
was made. (I am using the "getdate") to automatically grab this.
BUT I also want the "Expire_date" field automatically calculated and then filled in.
That is, a user enters a product "manufacture_date" as 05/22/2003,
Then I want the expire field to be filled with 05/22/2006.
My preference is to handle this on the DB site and not ASP.