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【优技教育】Oracle 19c OCP 082题库(Q 20题)- 2024年修正版
考试科目：1Z0-082
考试题量：90
通过分数：60%
考试时间：150min
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第20题：
Q 20、
Choose two.
Which two statements are true about Entity Relationships?
A) A table name can be specified just once when selecting data from a table having a self-referencing relationship.
B) A one-to-many relationship in one direction is a one-to one relationship in the other direction.
C) A many-to-many relationship can be implemented only by using foreign keys.
D) A relationship can be mandatory for both entities.
E) A one-to-one relationship is always a self referencing relationship.
Answer：BD
(解析：实体关系是关系型数据库中很重要的概念，一对多的关系在某方面可以看成是一对一，因为他们之间都有一对一的属性; 两张表可以组成关联关系。)
Oracle 19c OCP认证需要到Oracle指定的WDP机构，有了培训记录之后才能考试，考试需要考2科，分别是082(60%及格)和083(57%及格)，两科都通过之后才能拿到证书。证书如下：
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