Precise Customer Lookup
A service searches for orders belonging to user_id = 42. Add an index on orders.user_id so this precise lookup does not scan the whole orders table.
Speed this query up with an index
SELECT * FROM orders WHERE user_id = 42
Kun CREATE/ALTER/DROP — ingen afsluttende SELECT nødvendig.
Log ind for at se indsendelseshistorik
Log indLog ind for at bruge AI-mentor
Log ind