Mysql 如何确定是否有任何值位于4行以上？（业余）

此代码返回此表：

如何找出超过4行的名称并返回它们所在的行数

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谢谢

您似乎想要聚合：

select tr.routeID, tr.`Start`, tr.Destination, to2.OperatorID, to3.Name 
from tbl_route tr 
inner join tbl_operatorrouterelation to2 
on tr.RouteID = to2.RouteID 
inner join tbl_operatordesc to3 
on to2.OperatorID = to3.OperatorID

groupby

子句假定

OperatorID

是

tbl\u operatordesc

的主键。如果不是这样，您需要在该子句中更改add

o.Name

，如：

select o.Name, count(*) as cnt  
from tbl_operatordesc o
inner join tbl_operatorrouterelation orr on orr.OperatorID = o.OperatorID
inner join tbl_route r on r.RouteID = orr.RouteID   
group by o.OperatorID
having count(*) > 4

group by o.OperatorID, o.Name