考试报名
考试报名
考试内容
考试大纲
在线客服
返回顶部

备考刷题,请到

CDA认证小程序

The diagram below is an E-R diagram representing the dimension tables and fact table used in sales management. Please refer to the diagram to answer the following questions: Primary Chinese-English Correspondence. "产品" :"Product" "产品编号" : "Product ID" "产品经理" :"Product Manager" “产品类型”: “Product Type” “产品系列”:“Product Series” “城市编号”:“ City Code” “城市经理编号”:“ City Manager ID” “城市名”: “City Name” “区域编号“:“Regional Code” “区域经理“:“Regional Manager” “区域名“:“Regional Name“ “第三方评级“:“Third-party Rating” “金额”:“Amount” “商机编号”: “Business Opportunity ID” “上周销售阶段”:“ Last Week's Sales Stage” “所属领域“:“Relevant Domain” “所属行业“:“Industry Affiliation” “预计签约日“:“Expected Signing Date” Carefully observe the corresponding relationships between the tables in the above diagram and identify one incorrect connection by its number.
A. 1
B. 2
C. 3
D. No errors
上一题
下一题
收藏
点赞
评论
题目解析
题目评论(0)

The Customer table and the Opportunity Records table should have a one-to-many relationship between a dimension table and a fact table, so the error is at the number 3, which corresponds to option C.

正确答案是:D: No errors

专业分析如下:

观察给定的E-R图,可以看到各个表之间的关系和连接。以下是对每个连接的分析:

1. **连接1**:产品(Product)表与事实表(Fact Table)通过产品编号(Product ID)连接。这是一个典型的维度表和事实表的连接方式,符合数据库设计的规范。

2. **连接2**:城市(City)表与事实表通过城市编号(City Code)连接。这也是一个典型的维度表和事实表的连接方式,符合数据库设计的规范。

3. **连接3**:区域(Region)表与事实表通过区域编号(Regional Code)连接。这同样是一个典型的维度表和事实表的连接方式,符合数据库设计的规范。

根据以上分析,各个连接都符合数据库设计的规范和标准,未发现错误连接。因此,正确答案是D: No errors。