________ is the study of language in relation to the mind.
A.Sociolinguistics
B.Psycholinguistics
C.Linguistics
D.Semantics
A.Sociolinguistics
B.Psycholinguistics
C.Linguistics
D.Semantics
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];
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
实现“取消用户USER4对学生表STUD中学号(XH)的修改权限”这一功能的SQL语句是()。
A.REVOKE UPDATE (XH) ON TABLE FROM USER4;
B.REVOKE UPDATE (XH) ON TABLE STUD FROM PUBLIC ;
C.REVOKE UPDATE (XH) ON TABLE STUD FROM USER4;
D.REVOKE ALL PRIVILEGES ON TABLE STUD FROM USER4;
在学生表STUD中,查询既不是信息系“IS”、数学系“MA”,也不是计算机系"CS”的学生的姓名(XM)和性别(XB) 。实现该功能的正确SQL语句是______。
A.SELECT XM,XB FROM STUD WHERE SD IN("IS","MA","CS")
B.SELECT XM,XB FROM STUD WHERE SD NOT IN("IS","MA","CS")
C.SELECT XM,XB FROM STUD WHERE SD NOT("IS","MA","CS")
D.SELECT XM,XB FROM STUD WHERE SD NOT IN(IS,MA,CS)
在学生表STUD中,查询年龄在20至23岁之间的学生的姓名(XM)、年龄(SA) 和所在系(SD) ,实现该功能的正确SQL语句是______。
A.SELECTXM,SA,SD FROM STUD WHERE BETWEEN 20
B.SELECT XM,SA,SD FROM STUD WHERE SA BETWEEN 23 AND 20;
C.SELECT XM,SA,SD FROM STUD WHERE SA NOT BETWEEN 20 AND 23;
D.SELECT XM,SA,SD FROM STUD WHERE SA BETWEEN 20 AND 23;
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