错误代码: 1248 Every derived table must have its own alias
1、错误描述1queriesexecuted,0success,1errors,0warnings
查询:SELECTstu_id,(SELECTstu_nameFROMt_student_infotWHEREt.stu_id=t.stu_id)stu_nameFROM(SELECTSUM(CASEcourseWHEN'敮..
错误代码:1248
Everyderivedtablemustha