Find records from one table that not exists in other table.

Find records from one table that not exists in other table.

If we have product table and order table and we need to get those products which have not ordered by any customer as shown in above image.

 

SELECT p.id FROM product as p LEFT JOIN orders as o ON p.id = o.product_id WHERE o.product_id IS NULL

 

 

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Sangita Singh
profile Nguyen 14th December 2024

Kết quả trúng thưởng Xổ Số An Giang được xác định bằng cách đem so sánh dãy số trong tờ vé số với kết quả mở thưởng của nhà đài. xổ số an giang

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profile Nguyen 14th December 2024

có không ít người vẫn chưa biết cách chơi XSTN. Vậy hãy cùng  Dự đoán xổ số An Giang tìm hiểu cách chơi và kinh nghiệm tăng khả năng trúng thưởng nhé xổ số an giang

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profile Mike 12th November 2024

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profile Nguyen 10th October 2024

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