PART1The examiner will ask you some questions about yourself, such as:—What country do you

A、语句:DELETE FROM examiner WHERE erage＞60;的执行会删除examiner表中所有年龄大于等于60的考官。

B、语句:DELETE FROM examiner;的执行不会删除examiner表中任何元组。

C、语句:UPDATE examiner SET erage=erage+1 WHERE erage＞30;的执行会使examiner表中所有大于30岁考官的年龄加1。

D、语句:UPDATE examiner SET erage=erage+1;的执行不会使任何考官的年龄值发生变化。

A．The license office provides the test vehicle.

B．The examiner shows how to start, stop or park.

C．The examiner watches you driving in your car.

D．The test is carried out where there is little traffic.

A.investigator

B.examiner

C.surveyor

D.inquirer

有语句： SELECT DISTINCT erid FROM erexam WHERE erid IN (SELECT erid FROM examiner WHERE erdepa=’IST’); 还有语句： SELECT DISTINCT erid FROM erexam,examiner WHERE examiner.erid=erexam.erid AND erdepa=’IST’; 这两个语句的执行结果不等价。

A、

B、

C、

D、

E、

F、

G、

A、

B、

C、

D、

E、

F、

G、