mysql - 是否可以在 MySQL 表上执行内联 GROUP BY？

Question

是否可以在单个原子查询中执行以下行？

CREATE TABLE tmp AS 
(
    SELECT fooId, SUM(amount) AS amount 
    FROM foo 
    GROUP BY fooId
);
TRUNCATE TABLE foo;
INSERT INTO foo (SELECT fooId, amount FROM tmp);
DROP TABLE tmp;

Answer 1

我认为您正在尝试更新表格中的总数？尝试

REPLACE INTO foo (fooID, amount) 
SELECT fooID, sum(Amount) FROM foo