你可能感興趣的試題

You are working on the 24X7 database with high transaction volume， to ensure faster instance recovery on your database you set the FAST_START_MTTR_TARGET initialization parameter to a very low value. What effect it will have on the database？（）

A.The database performance would be enhanced.
B.The redo log files would be get filled more frequently.
C.The overall database performance would be degraded.
D.The mean time to recover （MTTR） would be increased.

多項(xiàng)選擇題

Which two statements are true about the primary key constraint in a table？（）

A.It is not possible to disable the primary key constraint.
B.It is possible to have more than one primary key constraint in a single table.
C.The primary key constraint can be referred by only one foreign key constraint.
D.The primary key constraint can be imposed by combining more than one column.
E.The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.

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Data files of which three tablespaces can be recovered by performing an open recovery？（）

你可能感興趣的試題

You are working on the 24X7 database with high transaction volume， to ensure faster instance recovery on your database you set the FAST_START_MTTR_TARGET initialization parameter to a very low value. What effect it will have on the database？（）

Which two statements are true about the primary key constraint in a table？ （）

Data files of which three tablespaces can be recovered by performing an open recovery？（）

You are working on the 24X7 database with high transaction volume， to ensure faster instance recovery on your database you set the FAST_START_MTTR_TARGET initialization parameter to a very low value. What effect it will have on the database？（）

Which two statements are true about the primary key constraint in a table？（）