【单选题】一个数据库中现有A、B、C、D、E、F六个语句,但目前这个数据库是不协调的,必须删除某些语句才能恢复数据库的协调性。已知: (1)如果保留语句A,那么必须保留语句B和语句C。 (2)如果保留语句E,则必须同时删除语句D和语句C。 (3)只有保留语句E,才能保留语句F。 (4)语句A是重要的信息,不能删除。 以上各项如果为真,则以下哪项一定为真?
【单选题】------ Did you win the volleyball game ? ------ Bad luck. Our team ________ in the final one.
【单选题】---Did you win the first prize in the running race? ---__________ Lisa ran a little faster than I!
【简答题】现有如下语句: CREATE PROCEDURE p (IN no1 INT,OUT pname VARCHAR(10)) BEGIN SELECT sname INTO pname FROM student WHERE sno=no1; END; 能够直接调用过程p,并能得到正确返回结果的语句是()。A. CALL p(100,@x); B. CALL p(100,’张红’); C. CAL...
【单选题】Did you win the metre race? Yes, I did. Really?()
【单选题】—Did you win the basketball game? —Bad luck. Our team _______ in the final one. [ ]
【单选题】设x,y,z,t均为整型变量,现有如下语句x=y=z=1;t=++x‖++y&&++z;,则执行这个语句后t的值为( ).
【单选题】- Did you win the match? - Unfortunately, we were beaten slightly _______ one goal. [ ]
【单选题】有如下SQL语句: CREATE VIEW VIEW_rcda AS SELECT 工资现状AS 工资,姓名 FROM rcda 执行该语句后产生的视图含有的字段名是( )
【单选题】---Did you win the game yesterday? ---Not really.__we all tried our best,we lost it.