MySQL Error number: 3029; Symbol: ER_AGGREGATE_ORDER_NON_AGG_QUERY; SQLSTATE: HY000 报错 故障修复 远程处理
文档解释
Error number: 3029; Symbol: ER_AGGREGATE_ORDER_NON_AGG_QUERY; SQLSTATE: HY000
Message: Expression #%u of ORDER BY contains aggregate function and applies to the result of a non-aggregated query
(至少一种)
Error 3029 (HY000): ER_AGGREGATE_ORDER_NON_AGG_QUERY
错误说明:
此错误产生当在查询中使用ORDER BY 时,与非聚合列不兼容。
常见案例
如果只有一个非聚合的列,且使用Order By子句用它排序,则可能会收到此错误消息:
Erro 3029 (HY000): ER_AGGREGATE_ORDER_NON_AGG_QUERY
下面的查询会生成上述错误消息:
SELECT category
FROM products
ORDER BY sales;
解决方法:
1.使用聚合函数使查询满足ORDER BY要求:
SELECT category, MAX(sales)
FROM products
GROUP BY category
ORDER BY sales;
2.将不需要排序的非聚合函数去掉:
SELECT category
FROM products;