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sql explain

Nice Narwhal answered on October 10, 2023 Popularity 8/10 Helpfulness 4/10

answer sql explain

sql explain

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EXPLAIN FORMAT=TREE
SELECT first_name, last_name, SUM(amount) AS total
FROM staff INNER JOIN payment
  ON staff.staff_id = payment.staff_id
     AND
     payment_date LIKE '2005-08%'
GROUP BY first_name, last_name;
 
-> Table scan on <temporary>
    -> Aggregate using temporary table
        -> Nested loop inner join  (cost=1757.30 rows=1787)
            -> Table scan on staff  (cost=3.20 rows=2)
            -> Filter: (payment.payment_date like '2005-08%')  (cost=117.43 rows=894)
                -> Index lookup on payment using idx_fk_staff_id (staff_id=staff.staff_id)  (cost=117.43 rows=8043)

Popularity 8/10 Helpfulness 4/10 Language sql

Source: dev.mysql.com

Tags: explain sql

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Contributed on Oct 10 2023

Nice Narwhal

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