多項(xiàng)選擇題

You execute this command to drop the ITEM table， which has the primary key referred in the ORDERtable：
SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE；
Which two statements are true about the effect of the command（）

A.No flashback is possible to bring back the ITEM table.
B.The ORDER table is dropped along with the ITEM table.
C.The dependent referential integrity constraints in the ORDER table are disabled.
D.The dependent referential integrity constraints in the ORDER table are removed.
E.The table definition of the ITEM table and associated indexes are placed in the recycle bin.

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多項(xiàng)選擇題

Which three descriptions are correct about the effects of the TRUNCATE command on a table（）

A.The corresponding indexes for the table are also truncated.
B.Delete triggers on the table are fired during the execution of the TRUNCATE command.
C.The child table is truncated when the TRUNCATE command is applied on the parent table.
D.The high-water mark （HWM） is set to point to the first usable data block in the table segment.
E.No undo or very little undo data is generated during the execution of the TRUNCATE command

單項(xiàng)選擇題

Which statement is true about the PCTFREE setting for the table（）

A.It sets the minimum percentage of a data block to be reserved to contain chained rows from other blocks.
B.It sets the minimum percentage of a data block to be reserved as free space before the server prevents inserts into the block.
C.It sets the minimum percentage of a data block to be reserved to contain the bitmap used to maintain the free block information.
D.It sets the minimum percentage of a block that can be used for row data plus overhead before new rows are added to the block.

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You execute this command to drop the ITEM table， which has the primary key referred in the ORDERtable： SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE； Which two statements are true about the effect of the command（）

你可能感興趣的試題

Which three descriptions are correct about the effects of the TRUNCATE command on a table（）

Which statement is true about the PCTFREE setting for the table（）

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You execute this command to drop the ITEM table， which has the primary key referred in the ORDERtable：
SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE；
Which two statements are true about the effect of the command（）