Business writing aviods self reference and references to individual states of mind.()
第1题:
第2题:
Professor White contributed a lot to our community,()
Ateaching, writing, and lecturing
Bteaching, writing, and a lecturer
Ca teacher, a writer, and lecturing
Dteaching, lecturing, and a writer
第3题:
如何在已经创建好的表上添加一个外键()。
A.Alter table 表名add foreign key(键名)reference 关联表(关联键名)
B.Alter table 表名add Primary key(键名)reference 关联表(关联键名)
C.Alter 表名add foreign key(键名)reference 关联键名
D.Alter 表名add Primary key(键名)reference 关联表(关联键名)
第4题:
Reference
Reference means what a linguistic form refers to in the real physical world; it deals with the relationship between the linguistic element and the non-linguistic world of experience.
略
第5题:
如何在已经创建好的表上添加一个外键()。
A.Alter table 表名add foreign key(键名)references 关联表(关联键名)
B.Alter table 表名add Primary key(键名)references 关联表(关联键名)
C.Alter 表名add foreign key(键名)references 关联键名
D.Alter 表名add Primary key(键名)references 关联表(关联键名)
第6题:
【单选题】MySQL中添加外键约束的语句是()
A.ALTER TABLE...ADD CONSTRAINT...FOREIGN KEY...REFERENCES...
B.ADD CONSTRAINT...FOREIGN KEY...REFERENCES...
C.ALTER TABLE...ADD CONSTRAINT...PRIMARY KEY...REFERENCES...
D.ADD CONSTRAINT...PRIMARY KEY...REFERENCES...