技術標籤：mysql資料庫

修改資料庫的最大group_concat連線長度：

SET GLOBAL group_concat_max_len = 102400;
SET SESSION group_concat_max_len = 102400;

#要徹底修改，在MySQL配置檔案(my.ini)中加上

group_concat_max_len = -1  # -1為最大值或填入你要的最大長度

#並重啟mysql
#在客戶端執行語句：

#show variables like "group_concat_max_len";  

建立表報錯：

[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
 

命令列執行

select version(), @@sql_mode;
SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));