View the following SQL statements: Transaction T1 INSERT INTO hr.regions VALUES (5,’Pole’);COMMIT; Transaction T2 UPDATE hr.regions SET region_name=’Poles’ WHERE region_id = 5; COMMIT; Transaction T3 UPDATE hr.regions SET region_name=’North and South Poles’ WHERE region_id = 5; You want to back out transaction T2. Which option would you use?() It is possible,but transaction T3 also backs out.。 It is possible with the NOCASCADE_FORCE option.。 It is possible with the NONCONFLICT_ONLY option.。 It is not possible because it has conflicts with transaction T3.。
在商业营销环境中,有目的地创设某些条件和变更某些条件,给消费者的心理活动施加一定刺激或诱导,从中了解消费者心理活动的方法。这种研究方法称为()。 直接观察法。 自我观察法。 实验室实验。 自然实验法。
Oracle Fusion Middleware Control runs as:() a module in Oracle HTTP Server。 a PL/SQL module in Oracle Database。 an application in WebLogic Server Administration Server。 an application in WebLogic Server Managed Server。
城市公共汽车运营方式有哪些?各自有何特点?
一个数组中的各元素的数据类型必须相同。
Which built-in allows you to update the screen display to reflect the information that Forms has in its internal representation of the screen? ()