Consider the following relation schemas.
Depositor (customerName, accNo)
Account (accNo, branchName, balance)
Branch(branchName, bCity, assets)
(πcustomer Name, branch Name (Depositor ⋈ Account) )
÷
(πbranch Name (σbCity = ‘Mumbai’ Branch))
The above relational query gives
1
the customer name and branch name who don’t have any account at all branches located at Mumbai
2
all customers who have an account at all branches located in Mumbai
3
all customers who don’t have an account at all branches located in Mumbai
4
None of these
5
Question Not Attempted