题目
题目

Homework:Chapter 4 Homework

单项选择题

Part 1The steps you will follow for this project are as​ follows:Review the Invoice Table LOADING... . Perform the requirements LOADING... on the data file. Use the relational tables that you have created to answer the five multiple choice questions below. ​(You will have to scroll down to see all of the​ questions.) As you answer the​ questions, resize windows as needed to see all relevant data. Part 1This project only has one attempt per​ question, unless your instructor has provided additional attempts. Review the dashboard before answering the questions. [table] | Save Accounting Table... | | + | Copy to Clipboard... | | + [/table] [table] In the Invoice-Inventory table, how many times is Invoice 57 displayed? [/table] A. 7 B. 3 C. 1 D. 4 [table] | Save Accounting Table... | | + | Copy to Clipboard... | | + [/table] [table] What is the designation of the Invoice ID column in the Invoice table? [/table] A. PK B.PK divided by FK PK divided by FKPK/FK C. 3NF D. FK [table] | Save Accounting Table... | | + | Copy to Clipboard... | | + [/table] [table] How many columns are in the Customer Table? [/table] A. 8 B. 4 C. 3 D. 2 [table] | Save Accounting Table... | | + | Copy to Clipboard... | | + [/table] [table] What is the designation of the Customer ID column in the Customer table? [/table] A. PK B. 3NF C. FK D.PK divided by FK PK divided by FKPK/FK [table] | Save Accounting Table... | | + | Copy to Clipboard... | | + [/table] [table] What is the designation of the Item ID column in the Invoice-Inventory table? [/table] A. 3NF B. FK C.PK divided by FK PK divided by FKPK/FK D. PK

选项
A.A. 7
B.B. 3
C.C. 1
D.D. 4
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标准答案
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思路分析
Let's break down the first question and its options, focusing on the specific data scenario described. Option A: 7. This choice asserts that Invoice 57 appears seven times in the Invoice-Inventory table. If the underlying dashboard or dataset shows far fewer occurrences for Invoice 57, this would overstate the frequency. Consider whether there are multiple line items or repeated rows for the same invoice; if those are not present or limited, seven is likely too high. Option B: 3. This option claims Invoice 57 appears three times. To evaluate......Login to view full explanation

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