发出下列语句:alter table sales drop columm profit;何时从Oracle中实际删除列?()
You are managing an ASM instance. You previously issued the following statements:
ALTER DISKGROUP dg1 DROP DISK disk2;
ALTER DISKGROUP dg1 DROP DISK disk3;
ALTER DISKGROUP dg1 DROP DISK disk5;
You want to cancel the disk drops that are pending for the DG1 disk group.
Which statement should you issue?()
Consider the following statement on a RANGE partitioned table: ALTER TABLE orders DROP PARTITION p1, p3;
What is the outcome of executing the above statement?()
免费的网站请分享给朋友吧