下面就是报错信息:Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'database.table.column' which is not functionally dependent on columns in GROUP BY clause; this is in...
一、背景:当Explain 与 SQL语句一起使用时,MySQL 会显示来自优化器关于SQL执行的信息。也就是说,MySQL解释了它将如何处理该语句,
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