Why didn't you use 'For All' ?

Query: Customer who have account or loan or both. 

Tutorial Video No: 6 (Example on Tuple Relational Calculus)

Why can't I Replace "For All" in the place of "There Exist"?

1Comment
shivani @shivani1234
9 Oct 2017 11:58 am

There might be case when customer is only borrower and not depositor , or depositor and not borrower .While For All will ensure that customer is both borrower and depositor.