A number of the students attended the meeting _____ the day before yesterday.A.heldB.
A.held
B.hold
C.holding
D.holded
- · 有5位网友选择 B,占比55.56%
- · 有2位网友选择 D,占比22.22%
- · 有1位网友选择 C,占比11.11%
- · 有1位网友选择 A,占比11.11%
A.held
B.hold
C.holding
D.holded
What are the two main types of stud link chain ________.
A.Oil Rig chain and Oil Field Stud Link chain
B.Flash-butt welded chain and Di-Lok chain
C.Flash-butt welded chain and Oil Rig chain
D.Oil Field Stud Link chain and Flash-butt welded chain
A.SELECT XM,SA FROM STUD FOR SA <25
B.SELECT XM,SA FROM STUD WHERE SA <25
C.SELECT XM,SA ON STUD FOR SA <25
D.SELECT XM,SA ON STUD WHERE SA <25
把学生表STUD中的学生“王小鱼”的姓名改为“王大川”,实现该功能的SQL语句是______。
A.UPDATE STUD姓名=“王小鱼”WHERE 姓名=“王大川”
B.UPDATE STUD姓名=“王大川”WHERE姓名=“王小鱼”
C.UPDATE STUD SET姓名=“王小鱼”WHERE姓名=“王大川”
D.UPDATE STUD SET姓名=“王大川”WHERE姓名=“王小鱼”
A、struct student { long no; double score; };
B、struct stud[20] { long no; double score; };
C、struct student { long no; double score; }stud[20];
D、struct { long no; double score; } stud[100];
A.SELECT * FROM stud ORDER BY birthday DESC LIMIT 8;
B.SELECT * FROM stud ORDER BY birthday ASC LIMIT 8;
C.SELECT * FROM stud ORDER BY birthday ASC LIMIT 7;
D.SELECT * FROM stud ORDER BY birthday DESC LIMIT 7;
A.SHOW TABLE CREATE stud
B.DISPLAY CREATE TABLE stud
C.SHOW CREATE TABLE stud
D.DESCRIBE stud
删除学生表STUD中关于学号XH必须取唯一值的约束。实现该功能的正确SQL语句是______。
A.ALTER TABLE STUD ADD XH UNIQUE
B.ALTER TABLE STUD MODIFY XH UNIQUE
C.ALTER TABLE STUD DROP UNIQUE(XH)
D.ALTER TABLE STUD MODIFY UNIQUE(XH)
在学生表STUD中查询所有小于20岁的学生姓名(XM)及其年龄(SA)。实现该功能的正确SQL语句是______。
A.SELECT XM,SAFROM STUD FOR SA<20
B.SELECT XM,SA FROM STUD WHERE NOT SA>=20
C.SELECT XM,SA ON STUD FOR SA<20
D.SELECT XM,SA ON STUD WHERE SA<20
A.SELECT XM,SA FROM STUD FOR SA <25
B.SELECT XM,SA FROM STUD WHERE SA <25
C.SELECT XM,SA ON STUD FOR SA <25
D.SELECT XM,SA ON STUD WHERE SA <25
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