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You work as a database administrator for Certkiller .com. You received the following error while working on your database： ORA-01555： snapshot too old  In which situation would you receive such an error？（）

单选题
2022-10-08 14:28
A、You performed rollback after commit.
B、If a log switch occurs in your database.
C、Thearchiverfails to generate an archived log file.
D、Instance recovery fails to find one of the redo log files.
E、A long-running query is unable to get read-consistent image.
F、If you perform manual undo management operations in auto mode.
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正确答案
E
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标签： CMS专题
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