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Question
B) Oracle GROUP BY with an aggregate function example
The following statement returns the number of orders by customers:
Answer
| SELECT customer_id, COUNT ( order_id ) FROM orders GROUP BY customer_id ORDER BY customer_id; |
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Question
B) Oracle GROUP BY with an aggregate function example
The following statement returns the number of orders by customers:
Answer
?
Tags
#has-images
Question
B) Oracle GROUP BY with an aggregate function example
The following statement returns the number of orders by customers:
Answer
| SELECT customer_id, COUNT ( order_id ) FROM orders GROUP BY customer_id ORDER BY customer_id; |
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The Ultimate Guide to Oracle GROUP BY with Examples
1 2 3 4 5 6 SELECT status FROM orders GROUP BY status; This statement has the same effect as the following statement that uses the DISTINCT operator: 1 2 3 4 SELECT DISTINCT status FROM orders; <span>B) Oracle GROUP BY with an aggregate function example The following statement returns the number of orders by customers: 1 2 3 4 5 6 7 8 9 SELECT customer_id, COUNT( order_id ) FROM orders GROUP BY customer_id ORDER BY customer_id; In this example, we grouped the orders by customers and used the COUNT() function to return the number of orders per group. To get more meaningful data, you can join the orders table wi
The Ultimate Guide to Oracle GROUP BY with Examples
1 2 3 4 5 6 SELECT status FROM orders GROUP BY status; This statement has the same effect as the following statement that uses the DISTINCT operator: 1 2 3 4 SELECT DISTINCT status FROM orders; <span>B) Oracle GROUP BY with an aggregate function example The following statement returns the number of orders by customers: 1 2 3 4 5 6 7 8 9 SELECT customer_id, COUNT( order_id ) FROM orders GROUP BY customer_id ORDER BY customer_id; In this example, we grouped the orders by customers and used the COUNT() function to return the number of orders per group. To get more meaningful data, you can join the orders table wi
Summary
| status | not learned | measured difficulty | 37% [default] | last interval [days] | |||
|---|---|---|---|---|---|---|---|
| repetition number in this series | 0 | memorised on | scheduled repetition | ||||
| scheduled repetition interval | last repetition or drill |
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