3. Range Check

A range check is commonly used when you are working with data which consists of numbers, currency or dates/times.

A range check allows you to set suitable boundaries:


Boundary Description Validation
Upper limit The maximum price of any item in a shop is £100
Lower limit In a shop, you cannot sell a negative number of items, however you can sell no items
A range to achieve a B grade you must score between 75% - 84%

>=75 AND <=84

Challenge see if you can find out one extra fact on this topic that we haven't already told you

Click on this link: Database Validation