MySQL报错SELECT list is not in GROUP BY clause and contains nonaggre的问题
报错现象执行SQL报错如下:bashSELECTstudent.s_no,student.s_name,SUM(result.mark)FROMstudent,resultWHEREstudent.s_noresult.s_noGROUPBYstudent.s_no1055Expression2ofSELECTlis