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Developer-C 11.1
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WITH tbl1 AS ( SELECT 1 AS id, 1.23 AS price UNION ALL SELECT 2, 4.56 UNION ALL SELECT 3, 7.89 ), tbl2 AS ( SELECT 2 AS id, 99.99 AS price ) SELECT p.id, COALESCE(o.price, p.price) price FROM tbl1 p LEFT JOIN tbl2 o ON p.id = o.id;
id
price
1
1.23
2
99.99
3
7.89