uppose we have the following structure for the "Orders" table:Order ID Customer Name Order Details1001 John Doe Laptop, Monitor, Mouse, Keyboard1004 Jane Smith Smartphone, Tablet, Headphones1003 Alice Brown Chair, Desk, Lamp, Bookshelf, Coffee Table1002 Alice Brown NULLAnswer the following questionsQuestion 1This table violates 1NF because:The "Customer Name" column contains duplicate valuesThe "Order Details" column contains multiple values (multiple order details) in the same cell.The "Order Details" column contains NULL values
Question
uppose we have the following structure for the "Orders" table:Order ID Customer Name Order Details1001 John Doe Laptop, Monitor, Mouse, Keyboard1004 Jane Smith Smartphone, Tablet, Headphones1003 Alice Brown Chair, Desk, Lamp, Bookshelf, Coffee Table1002 Alice Brown NULLAnswer the following questionsQuestion 1This table violates 1NF because:The "Customer Name" column contains duplicate valuesThe "Order Details" column contains multiple values (multiple order details) in the same cell.The "Order Details" column contains NULL values
Solution
The table violates the 1NF (First Normal Form) for the following reasons:
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The "Order Details" column contains multiple values in the same cell. According to the rules of 1NF, each column in a table should contain atomic (indivisible) values. Here, multiple items ordered by a customer are listed in the same cell, which violates this rule.
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The "Order Details" column contains NULL values. In 1NF, all columns in a table should contain a value for each row. Here, the "Order Details" column for Order ID 1002 does not contain any value, which is a violation.
The "Customer Name" column containing duplicate values does not violate 1NF. It's common in databases for some columns to have duplicate values. For example, a customer can place more than one order, so their name would appear more than once in the "Customer Name" column. This is not a violation of 1NF.
Similar Questions
Suppose we have the following structure for the "Orders" table:Order ID Customer Name Order Details1001 John Doe Laptop, Monitor, Mouse, Keyboard1004 Jane Smith Smartphone, Tablet, Headphones1003 Alice Brown Chair, Desk, Lamp, Bookshelf, Coffee Table1002 Alice Brown NULLAnswer the following questionsQuestion 1This table violates 1NF because:The "Customer Name" column contains duplicate valuesThe "Order Details" column contains multiple values (multiple order details) in the same cell.The "Order Details" column contains NULL valuesOrder is not maintained in the column "Order ID"All of theseSave
Suppose we have the following structure for the "Orders" table:Order ID Customer Name Order Details1001 John Doe Laptop, Monitor, Mouse, Keyboard1004 Jane Smith Smartphone, Tablet, Headphones1003 Alice Brown Chair, Desk, Lamp, Bookshelf, Coffee Table1002 Alice Brown NULLAnswer the following questionsQuestion 1Question 2What is the first step to normalize the "Orders" table into 1NF?Remove the Order Details columnSeparate orders into individual rowsSeparate each item in the Order Details into individual rowsCombine multiple items into a single columnSave
Suppose we have a table named "Books" with the following structure:Book ID Title Author Genre1 The Great Gatsby F. Scott Fitzgerald, Orwell Fiction, Dystopian2 Pride and Prejudice Jane Austen Romance, Thriller3 The Catcher in the Rye J.D. Salinger Fiction, SuspenseAnswer the following questionsQuestion 1This table violates 1NF because:The "Author" column contains multiple values (multiple authors) in the same cell.The "Genre" column contains multiple values (multiple genres) in the same cell.Both a and bTable is in 1NF only
You are working with a data set including order records and their ID numbers. While profiling the data, you noticed that there are duplicate values in the "ID" field for each order. You need to create a data set that only shows one record per order, which would create a data set with distinct orders. What keyword can you include in the query to provide a unique list of orders?Select an answer:REMOVE DUPLICATESDELETEDISTINCT
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