Which of the following statements is true about SQL?

SQL stands for Standard Query Language.

SQL is a programming language used for creating websites.

SQL can only be used with Microsoft databases.

What is the purpose of the DISTINCT keyword in SQL?

It removes duplicate rows from the query result.

It sorts the result in ascending order.

It filters rows based on a specific condition.

It joins multiple tables together.

In SQL statements, what is the role of the semicolon (;)?

It marks the end of a SQL statement.

It is used to separate values in a column.

It denotes a wildcard character in pattern matching.

It is used to indicate a comment in the SQL code.

What is the purpose of the WHERE clause in SQL?

It specifies the columns to be included in the query result.

It defines the order in which the query results are displayed.

It filters rows based on a specific condition.

It joins multiple tables together.

Consider the following SQL code: SELECT * FROM Customers; What does the above code do?

Retrieves all columns from the Customers table.

Retrieves only the CustomerID column from the Customers table.

Retrieves all rows from the Customers table.

Retrieves only the first row from the Customers table.

Consider the following SQL code: SELECT COUNT(*) FROM Orders; What does the above code return?

The total number of columns in the Orders table.

The average value of all columns in the Orders table.

The total number of rows in the Orders table.

The sum of all values in the Orders table.

Consider the following SQL code: SELECT ProductName, Price FROM Products WHERE Price > 50;

Retrieves all columns from the Products table.

Retrieves the ProductName and Price columns from the Products table for rows where the Price is greater than 50.

Retrieves the ProductName and Price columns from the Products table for rows where the ProductName contains "50".

Retrieves the ProductName and Price columns from the Products table for rows where the Price is less than or equal to 50.

Consider the following SQL code: SELECT AVG(Quantity) FROM Sales;

The average value of the Quantity column in the Sales table.

The sum of all values in the Quantity column of the Sales table.

The total number of rows in the Sales table.

The maximum value in the Quantity column of the Sales table.

Consider the following SQL code: SELECT DISTINCT Country FROM Customers; What does the above code do?

Retrieves all columns from the Customers table.

Retrieves only the Country column from the Customers table.

Retrieves distinct values from the Country column of the Customers table.

Retrieves unique rows from the Customers table based on the Country column.

Which of the following statements is true about SQL queries?

All SQL queries must contain a WHERE clause.

SQL queries can only retrieve data from a single table.

SQL queries can be used to insert data into a table.

SQL queries cannot perform mathematical calculations.

Consider the following SQL code: SELECT FirstName, LastName FROM Employees WHERE LastName LIKE 'S%';

Retrieves the FirstName and LastName columns from the Employees table for employees whose last name starts with 'S'.

Retrieves the FirstName and LastName columns from the Employees table for employees whose last name ends with 'S'.

Retrieves the FirstName and LastName columns from the Employees table for employees whose last name contains 'S'.

Retrieves the FirstName and LastName columns from the Employees table for employees whose last name is 'S'.

Consider the following SQL code: SELECT * FROM Orders WHERE OrderDate BETWEEN '2022-01-01' AND '2022-12-31';

Retrieves all columns from the Orders table for orders placed in the year 2022.

Retrieves only the OrderDate column from the Orders table for orders placed between January 1, 2022, and December 31, 2022.

Retrieves all columns from the Orders table for orders placed between January 1, 2022, and December 31, 2022.

Retrieves only the OrderDate column from the Orders table for orders placed before January 1, 2022.

Consider the following SQL code: SELECT ProductID, SUM(Quantity) FROM OrderDetails GROUP BY ProductID; What does the above code do?

Retrieves the ProductID and Quantity columns from the OrderDetails table, grouped by ProductID, and calculates the sum of Quantity for each group.

Retrieves the ProductID and Quantity columns from the OrderDetails table, grouped by Quantity, and calculates the sum of Quantity for each group.

Retrieves the ProductID and Quantity columns from the OrderDetails table, grouped by ProductID, and calculates the average value of Quantity for each group.

Retrieves the ProductID and Quantity columns from the OrderDetails table, grouped by ProductID, and calculates the maximum value of Quantity for each group.

Consider the following SQL code: SELECT CustomerID, COUNT(OrderID) FROM Orders GROUP BY CustomerID HAVING COUNT(OrderID) > 5; What does the above code do?

Retrieves the CustomerID and OrderID columns from the Orders table, grouped by CustomerID, and counts the total number of orders for each customer, excluding customers with less than or equal to 5 orders.

Retrieves the CustomerID and OrderID columns from the Orders table, grouped by CustomerID, and counts the total number of orders for each customer, including customers with less than or equal to 5 orders.

Retrieves the CustomerID and OrderID columns from the Orders table, grouped by OrderID, and counts the total number of customers for each order, excluding orders with less than or equal to 5 customers.

Retrieves the CustomerID and OrderID columns from the Orders table, grouped by OrderID, and counts the total number of customers for each order, including orders with less than or equal to 5 customers.

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