SQL NOT EXISTS
SELECT customer_id, first_name
FROM Customers
WHERE NOT EXISTS (
SELECT order_id
FROM Orders
WHERE Orders.customer_id = Customers.customer_id
);SQL NOT EXISTS
SELECT customer_id, first_name
FROM Customers
WHERE NOT EXISTS (
SELECT order_id
FROM Orders
WHERE Orders.customer_id = Customers.customer_id
);sql not exists
-- The SQL NOT EXISTS Operator will act quite opposite to EXISTS Operator.
-- It is used to restrict the number of rows returned by the SELECT Statement.
SELECT column_name
FROM table_name
WHERE NOT EXISTS (Write Subquery to Check);Copyright © 2021 Codeinu
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