升级到 mysql 5.7.21 后：与 sql_mode=only_full_group_by 不兼容

Question

从 5.7.20 升级到 mysql 5.7.21 后，出现错误

SELECT ac.vatcode_id,ac.vatcode_type,v.name vatcode_name,v.txt vatcode_txt
FROM `accounting` ac
LEFT JOIN `vatcode` v ON v.id=ac.vatcode_id
WHERE ac.account_id=300479 && ac.vatcode_id>=0 && ac.time BETWEEN 1514764800 AND 1546214400 && ac.block_id=4431
GROUP BY ac.vatcode_id

#1055 - Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'dynaccount.ac.vatcode_type' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

# show variables;
sql_mode
STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

Answer 1

您的查询无效。您告诉 DBMS："per ac.vatcode_id give me the ac.vatcode_type"。并且 DBMS 告诉您没有 the ac.vatcode_type 每个 ac.vatcode_id；可以有多个不同的。那你想要哪个？最大值？然后做这个MAX(ac.vatcode_type)。最小值？然后制作MIN(ac.vatcode_type)。你不在乎哪个？然后使这个 ANY_VALUE(ac.vatcode_type).

您的新 MySQL 版本更加严格，希望您编写符合 SQL 标准的有效查询。这是好事。

升级到 mysql 5.7.21 后：与 sql_mode=only_full_group_by 不兼容

After upgrading to mysql 5.7.21: incompatible with sql_mode=only_full_group_by

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