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This video is very useful for all students who are preparing for the exams like(like GATE, NTA NET, NIELIT, PSU, DSSSB, KVS, Htet).
Lecture By Nagarajan.S
In SQL, the GROUP BY clause is used to group rows by one or more columns.
GROUP BY Clause With JOIN in SQL
We can also use the GROUP BY clause with the JOIN clause.
SELECT Customers.customer_id, Customers.first_name, Count(Orders.order_id) AS order_count
FROM Customers
LEFT JOIN Orders
ON Customers.customer_id = Orders.customer_id
GROUP BY Customers.customer_id;
This video is very useful for learn Machine learning
Lecture By Nagarajan.S
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