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Consider the following SQL table definition:
CREATE TABLE Products (
ID INT PRIMARY KEY,
Name VARCHAR(50) NOT NULL,
Price DECIMAL(10, 2) CHECK (Price > 0),
CategoryID INT,
CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID)
);
Which of the following statements about the Products table is correct?
ID INT PRIMARY KEY,
Name VARCHAR(50) NOT NULL,
Price DECIMAL(10, 2) CHECK (Price > 0),
CategoryID INT,
CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID)
);
Which of the following statements about the Products table is correct?
- a)The ID column is the primary key, and its values must be unique.
- b)The Name column cannot have NULL values.
- c)The Price column must have a value greater than 0.
- d)The CategoryID column is a foreign key referencing the ID column in the Categories table.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Consider the following SQL table definition:CREATE TABLE Products ( I...
The CategoryID column in the Products table is a foreign key referencing the ID column in the Categories table.
Most Upvoted Answer
Consider the following SQL table definition:CREATE TABLE Products ( I...
Understanding the Products Table Definition
The SQL table definition provided outlines the structure and constraints of the Products table.
Key Characteristics of the Products Table:
- Primary Key: ID
- The ID column is defined as the primary key, ensuring that each value in this column is unique and cannot be NULL.
- Not NULL Constraint: Name
- The Name column has a NOT NULL constraint, meaning it must contain a value; it cannot be left empty.
- Check Constraint: Price
- The Price column includes a CHECK constraint that enforces that values must be greater than 0. This means any attempt to insert or update a record with a Price of 0 or less will fail.
- Foreign Key Constraint: CategoryID
- The CategoryID column is a foreign key that references the ID column in the Categories table. This establishes a relationship between the Products table and the Categories table, ensuring that any value in CategoryID must correspond to an existing ID in the Categories table.
Conclusion: Why Option 'D' is Correct
Among the statements:
- Option 'A' is true but does not specifically highlight the uniqueness aspect.
- Option 'B' is also true but is not the primary focus.
- Option 'C' is correct about price constraints but is not as significant as the foreign key relationship.
- Option 'D' is the most crucial as it identifies the foreign key relationship, which is essential for maintaining data integrity across related tables.
Thus, option 'D' stands out as the key point regarding the structure of the Products table.
The SQL table definition provided outlines the structure and constraints of the Products table.
Key Characteristics of the Products Table:
- Primary Key: ID
- The ID column is defined as the primary key, ensuring that each value in this column is unique and cannot be NULL.
- Not NULL Constraint: Name
- The Name column has a NOT NULL constraint, meaning it must contain a value; it cannot be left empty.
- Check Constraint: Price
- The Price column includes a CHECK constraint that enforces that values must be greater than 0. This means any attempt to insert or update a record with a Price of 0 or less will fail.
- Foreign Key Constraint: CategoryID
- The CategoryID column is a foreign key that references the ID column in the Categories table. This establishes a relationship between the Products table and the Categories table, ensuring that any value in CategoryID must correspond to an existing ID in the Categories table.
Conclusion: Why Option 'D' is Correct
Among the statements:
- Option 'A' is true but does not specifically highlight the uniqueness aspect.
- Option 'B' is also true but is not the primary focus.
- Option 'C' is correct about price constraints but is not as significant as the foreign key relationship.
- Option 'D' is the most crucial as it identifies the foreign key relationship, which is essential for maintaining data integrity across related tables.
Thus, option 'D' stands out as the key point regarding the structure of the Products table.
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Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer?
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Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer?.
Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following SQL table definition:CREATE TABLE Products ( ID INT PRIMARY KEY, Name VARCHAR(50) NOT NULL, Price DECIMAL(10, 2) CHECK (Price > 0), CategoryID INT, CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Categories(ID));Which of the following statements about the Products table is correct?a)The ID column is the primary key, and its values must be unique.b)The Name column cannot have NULL values.c)The Price column must have a value greater than 0.d)The CategoryID column is a foreign key referencing the ID column in the Categories table.Correct answer is option 'D'. Can you explain this answer?.
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