【多选题】
A <{p}>FLASHBACK transaction query requires undo to retrieve all versions of a row that existed<{br/}>between two points in time.<{br/}><{/p}>
B <{p}>FLASHBACK drop requires that the RECYCLEBIN parameter be set to ON.<{br/}><{/p}>
C <{p}>FLASHBACK version query requires that the RECYCLEBIN parameter be set to ON.<{br/}><{/p}>
D <{p}>FLASHBACK DATA ARCHIVE requires undo to store all versions of all rows of a table being tracked.<{br/}><{/p}>
E <{p}>FLASHBACK drop requires undo to retrieve all versions of a row that existed between two points<{br/}>in time.<{br/}><{/p}>
F <{p}>FLASHBACK version query requires undo to retrieve all versions of a row that existed between<{br/}>two points in time.<{br/}><{/p}>
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