题解 | #纠错3#
纠错3
https://www.nowcoder.com/practice/3870c9bca7a4406f899af3e903b8bf51
SELECT order_num, COUNT(*) AS items FROM OrderItems GROUP BY order_num HAVING items >= 3 ORDER BY items, order_num;
1.group by中必须包含select语句中的非聚合函数
纠错3
https://www.nowcoder.com/practice/3870c9bca7a4406f899af3e903b8bf51
SELECT order_num, COUNT(*) AS items FROM OrderItems GROUP BY order_num HAVING items >= 3 ORDER BY items, order_num;
1.group by中必须包含select语句中的非聚合函数
相关推荐