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SQL SELECT IN SELECT

When a select from where expression is insufficient to express a complex query, a sub-query as a select from where expression can be nested within another query.

Let's take an example to explore it completely:

We have to found all customers who have both an account and a loan at Mohan Nagar branch.

SELECT distinct customer_name
FROM borrower, loan
WHERE borrower.loan_number   = loan.loan_number and
Branch_name =Mohan Nagar and
(branch_name, customer_name) IN
(SELECT branch_name, customer_name
From depositor, account
Where depositor .account_number = account.account_number)

Next TopicSQL Select Null

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