使用group by 在5.7中 mysql 報錯1055

 執行sql:　　　

SELECT ability,count
FROM 
(
SELECT
q.ability,
count( 1 ) as count
FROM
spk_wrong_que_train t
LEFT JOIN spk_hsk_question q ON t.question_id = q.id
WHERE
t.user_id = 1
group by
q.ability

UNION
SELECT '1' as ability,'0' as count
union 
SELECT '3' as ability,'0' as count
union 
SELECT '4' as ability,'0' as count
union 
SELECT '5' as ability,'0' as count
union 
SELECT '6' as ability,'0' as count

) B
GROUP BY B.ability

 

 

 

 

結果：執行成功

　　

5.7以上版本 結果：報錯

 

 

問題：

報錯信息：　　1055 - Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'B.count' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

　因爲本地環境mysql 是5.7如下版本，線上5.7以上版本：

 

解決：

　　　　使用ANY_VALUE（），MySQL會忽略每一個名稱組中的地址值的不肯定性並接受查詢，就能夠了！