UPDATE orders SET user_id = 101 WHERE order_id = 1; UPDATE orders SET user_id = 101 WHERE order_id = 2; UPDATE orders SET user_id = 102 WHERE order_id = 3; UPDATE ...
Handwritten SQL exercise focused on NULL handling techniques such as COALESCE, ISNULL, and IFNULL. Demonstrates practical data cleaning skills and understanding of how to manage missing values in real ...
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