表A,有列id,name表B,有列id,action,dateA千万级数据量,表A对表B一对多,B记录A表人某天的动作情景一:语句1:select name, date from A join B on a.id=B.id where A.id='110' and B.action='吃饭';语句2:select name,(select date from B where B.id=A.id and B.action='吃饭') from A where A.id='110';语句3:select na……
修改