多选题You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?（）ABFILEBREF columnCObject tableDColumn objectEINSTEAD-OF trigger
多选题
You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?（）
A
BFILE
B
REF column
C
Object table
D
Column object
E
INSTEAD-OF trigger
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