Question

我正在使用GoDaddy VPS server，服务器设置完成后，我可以看到他们提供了MySql version 5.7。我在MySql查询中遇到以下错误，但是此查询在MySql 5.6

中运行良好

我有root access。

错误-> Expression #29 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'sephecom_ecom.v2.secondary_colors' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

Answer 1

这不是版本问题，是配置问题

问题是您拥有SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));。这意味着您所有的选择列都必须在GROUP BY上，或者必须使用聚合函数（例如sum，avg，count等）。如果您想避免这种情况，可以通过

进行更改

#include<iostream>
using namespace std;
int main()
{
    char day;
    cout<<"Enter the day\n";
    cin>>day;
    switch(day)
    {
        case 'monday': cout<<"The next day is Tuesday";
                       break;
        case 'tuesday': cout<<"The next day is Wednesday";
                        break;
        case 'wednesday': cout<<"The next day is Thursday";
                       break;
        case 'thursday': cout<<"The next day is Friday";
                       break;
        case 'friday': cout<<"The next day is Saturday";
                       break;
        case 'saturday': cout<<"The next day is Sunday";
                       break;
        case 'sunday': cout<<"The next day is Monday";
                       break;
        default: cout<<"Day is invalid";
                        break;
    }

}'''

Errors from the terminal:
case label value has already appeared in this switch at line 12[14,14]  
case label value has already appeared in this switch at line 12[16,14]  
case label value has already appeared in this switch at line 12[22,14]

如果您按条件修改组，则查询中可能会得到奇怪的结果

SELECT列表的表达式＃29不在GROUP BY子句中，并且包含未聚合的列

1 个答案: