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GUEST, unregistred user!
WareDetail表有至少有Autoid,Depotid两个字段<br>SQL 语句如下.<br>Select Autoid,Depot=(Select DepotName from Deport Where Autoid=D.Depotid) from WareDetail D<br>当用DBGrid作为输入界面时,当更新Depotid的值时,为什么Depot(即我所称的虚拟字段)不会及时更新?