单选题You work as a database administrator for Supportcenter.cn. You received the following error while working on your database： ORA-01555： snapshot too old ，In which situation would you receive such an error？（）A You performed rollback after commit.B If a l
题目
单选题
You work as a database administrator for Supportcenter.cn. You received the following error while working on your database： ORA-01555： snapshot too old ，In which situation would you receive such an error？（）
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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参考答案和解析
正确答案：
E
解析：
暂无解析