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047-054

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-18 09:25:18 0 删除 编辑
54. Which two statements are true about sequences created in a single instance
database? (Choose two.)
A. The numbers generated by a sequence can be used only for one table.
B. DELETE would remove a sequence from the database.
C. CURRVAL is used to refer to the last sequence number that has been
generated.
D. When the MAXVALUE limit for a sequence is reached, you can increase the
MAXVALUE limit by using the ALTER SEQUENCE statement.
E. When a database instance shuts down abnormally, the sequence numbers that
have been cached but not used would be available once again when the database
instance is restarted.
Answer: CD

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