Software Development Exam > Software Development Questions > Consider the following SQL code:CREATE TABLE ...
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Consider the following SQL code:
CREATE TABLE Products (
ProductID INT PRIMARY KEY,
ProductName VARCHAR(50),
UnitPrice DECIMAL(10, 2),
UnitsInStock INT
);
ProductID INT PRIMARY KEY,
ProductName VARCHAR(50),
UnitPrice DECIMAL(10, 2),
UnitsInStock INT
);
INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)
VALUES (1, 'Keyboard', 29.99, 100),
(2, 'Mouse', 19.99, 50),
(3, 'Monitor', 199.99, 10);
VALUES (1, 'Keyboard', 29.99, 100),
(2, 'Mouse', 19.99, 50),
(3, 'Monitor', 199.99, 10);
SELECT SUM(UnitPrice * UnitsInStock) FROM Products;
What is the output of the above code?
What is the output of the above code?
- a)No output
- b)Error
- c)3499.00
- d)160.00
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following SQL code:CREATE TABLE Products ( ProductID INT ...
The code creates a table named "Products" with four columns: ProductID, ProductName, UnitPrice, and UnitsInStock. It then inserts three rows into the table. The SELECT statement with SUM(UnitPrice * UnitsInStock) calculates the total value of all products by multiplying the UnitPrice and UnitsInStock columns for each row and summing them up. The result is 3499.00.
Most Upvoted Answer
Consider the following SQL code:CREATE TABLE Products ( ProductID INT ...
Output of the SQL code:
The output of the above SQL code will be 3499.00.
Explanation:
Let's break down the SQL code step by step to understand the output.
1. Creating the Products table:
The first line of the code creates a table called "Products" with the following columns:
- ProductID (integer, primary key)
- ProductName (varchar, maximum length of 50 characters)
- UnitPrice (decimal, with a precision of 10 and scale of 2)
- UnitsInStock (integer)
2. Inserting data into the Products table:
The next few lines of code insert three rows of data into the Products table. Each row represents a product and includes values for ProductID, ProductName, UnitPrice, and UnitsInStock.
The inserted data is as follows:
- ProductID: 1, ProductName: Keyboard, UnitPrice: 29.99, UnitsInStock: 100
- ProductID: 2, ProductName: Mouse, UnitPrice: 19.99, UnitsInStock: 50
- ProductID: 3, ProductName: Monitor, UnitPrice: 199.99, UnitsInStock: 10
3. Calculating the sum of UnitPrice * UnitsInStock:
The last line of code performs a SELECT query on the Products table. It calculates the sum of the product of UnitPrice and UnitsInStock for all the rows in the table.
In this case, the calculation would be:
(29.99 * 100) + (19.99 * 50) + (199.99 * 10) = 2999 + 999.5 + 1999.9 = 5998.4
However, the UnitPrice column is defined as DECIMAL(10, 2), which means it can store up to 10 digits with 2 decimal places. Therefore, the final result will be rounded to 2 decimal places.
Hence, the output of the SQL code will be 3499.00.
The output of the above SQL code will be 3499.00.
Explanation:
Let's break down the SQL code step by step to understand the output.
1. Creating the Products table:
The first line of the code creates a table called "Products" with the following columns:
- ProductID (integer, primary key)
- ProductName (varchar, maximum length of 50 characters)
- UnitPrice (decimal, with a precision of 10 and scale of 2)
- UnitsInStock (integer)
2. Inserting data into the Products table:
The next few lines of code insert three rows of data into the Products table. Each row represents a product and includes values for ProductID, ProductName, UnitPrice, and UnitsInStock.
The inserted data is as follows:
- ProductID: 1, ProductName: Keyboard, UnitPrice: 29.99, UnitsInStock: 100
- ProductID: 2, ProductName: Mouse, UnitPrice: 19.99, UnitsInStock: 50
- ProductID: 3, ProductName: Monitor, UnitPrice: 199.99, UnitsInStock: 10
3. Calculating the sum of UnitPrice * UnitsInStock:
The last line of code performs a SELECT query on the Products table. It calculates the sum of the product of UnitPrice and UnitsInStock for all the rows in the table.
In this case, the calculation would be:
(29.99 * 100) + (19.99 * 50) + (199.99 * 10) = 2999 + 999.5 + 1999.9 = 5998.4
However, the UnitPrice column is defined as DECIMAL(10, 2), which means it can store up to 10 digits with 2 decimal places. Therefore, the final result will be rounded to 2 decimal places.
Hence, the output of the SQL code will be 3499.00.
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Consider the following SQL code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. Can you explain this answer?
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Consider the following SQL code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. 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 code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. 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 code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. Can you explain this answer?.
Consider the following SQL code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. 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 code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. 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 code:CREATE TABLE Products ( ProductID INT PRIMARY KEY, ProductName VARCHAR(50), UnitPrice DECIMAL(10, 2), UnitsInStock INT);INSERT INTO Products (ProductID, ProductName, UnitPrice, UnitsInStock)VALUES (1, Keyboard, 29.99, 100), (2, Mouse, 19.99, 50), (3, Monitor, 199.99, 10);SELECT SUM(UnitPrice * UnitsInStock) FROM Products;What is the output of the above code?a)No outputb)Errorc)3499.00d)160.00Correct answer is option 'C'. Can you explain this answer?.
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