单项选择题
A. It would be automatically enabled and deferred.
B. It would be automatically enabled and immediate.
C. It would remain disabled and has to be enabled manually using the ALTER TABLE command.
D. It would remain disabled and can be enabled only by dropping the foreign key constraint and re-creating it.
单项选择题 WhichstatementistrueregardingFlashbackVersionQuery？（）
单项选择题 Evaluate the following statement： Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement？（）
单项选择题 EMPDET is an external table containing the columns EMPNO and ENAME. Which command would work in relation to the EMPDET table？（）
