多选题In which three situations is incomplete recovery required？（）AAfter a shutdown abort.BWhen recovering to an SCN.CWhen recovering until a specific time.DWhen a required archived log is missing.
多选题
In which three situations is incomplete recovery required？（）
A
After a shutdown abort.
B
When recovering to an SCN.
C
When recovering until a specific time.
D
When a required archived log is missing.
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