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idea database mysql驱动 一、下载mysql 下载地址：http://dev.mysql.com/downloads/connector/j/ 解压缩后，把文件（mysql-connector-java-8.0.19）添加到idea里 C:\Users\Administrator\.IntelliJIdea2018.1\config\jdbc-driver...

[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 ...