想請問一下，DataSet 和 Query 有什麼不同？兩者似乎都能將SELECT的結果存在記憶體中，不知道這兩者的差別在哪？做的事情也都一樣哩？    發表人 -

一般使用DataSet,Table或Query的Insert, Delete函式都會直接在資料庫上做變更，而只有ClientDataSet，才只會在記憶體中做變更，這樣的說法不知道正不正確？謝謝各位大大的指教！   

HI, 節錄一段 help 中的資料 TDataSet introduces the basic properties, events, and methods for working with data. Many of these properties, events, and methods are abstract (Delphi) or pure virtual (C ) in TDataSet. Abstract or pure virtual declarations are declarations without implementations. At the TDataSet level they cannot be used or accessed. Developers must use or derive descendants of TDataSet that redeclare and implement these abstract or pure virtual methods. Many of the other TDataSet methods are declared and implemented in TDataSet as virtual methods, but the implementations are merely stubs that are reimplemented in descendants. 基本上 TDataSet 是 TQuery 的上好幾層父代. 看一下這段你就會比較明白一點囉!