使用SQL Server查找PO记录在多行订单上有2个不同的发货日期

I have a bit of a strange situation. We have Purchase Orders that can have 1 or more lines. In case a purchase order has more than one line the requested ship dates should always be the same. The issue is that we are finding instances where it has been entered wrong and we have different ship dates on different lines. I have tried using I have a bit of a strange situation. We have Pu