【简答题】以下MySQL语句中,已知关系模式student(Sno,Sname,S,Sage,Sdept,Passwords),查询在student表中的分组记录,正确的是( )。A. SELECT sdept,COUNT(*) AS 人数 FROM student GROUP BY sdept; B. SELECT sdept AS 专业,AVG(sage) AS 平均年...
【简答题】完形填空。 Once there was a very brilliant,creative and educated man. He gained much while traveling throughout the world. 1 he lost his legs and left arm in a tragic accident,leaving only a finger and thu...
【简答题】完形填空。 A young man was going to 1 his holiday in a mountain village. That night he stayed at a small hotel near the train station. 2 going to bed, he went to the owner of the hotel and said, 'Excuse me...