单项选择题

What Normal From is the table shown in the exhibit
emps tbl
emp idemp_nameemp_phonedept_namedept_phonedept_mgrname
(1) emp_id→emp_name, emp_phone, dept_name(2) dept_name→ dept_phone, dept_mgrname

A．1NF
B．2NF
C．3NF
D．BCNF
<上一题 目录 下一题>
热门 试题

单项选择题
What is the candidate key of a relational database
A．A field with a constraint placed on it.
B．A set of fields that have no data in them.
C．A set of fields in a table used to identify a record uniquely.
D．Fields from multiple tables that are used for sorting records.
单项选择题
The following sectors are requested from the disk:11,1,36,16,34,9,12What is the order of the sector reads if you are using the elevator algorithm
A．1,9,11,12,16,34,36
B．11,1,36,16,34,9,12
C．11,12,9,16,1,34,36
D．11,12,16,34,36,9,1
相关试题