MYsql5.7版本之后，用group by查询不在分组字段遇到的坑

select uid,name from (select uid,name from aa union select uid,name from bb) t group by uid order by uid desc LIMIT 10;

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运行上面那个SQL会报错，因为5.7版本之后的MYSQL不在group by里的字段 跟在select会报错解决办法是，用函数 any_value(字段名)

select any_value(name),max(uid)from (select uid,name from aa union select uid,name from bb) t group by uid order by uid desc LIMIT 10;
运行上面的SQL 不报错了

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any_value(字段名)允许，非分组字段的出现