Combine First and Last Names into a Computed Full Name

Create a View with Computed Columns

Write a PostgreSQL query to create a view that combines first and last names into a full name.

Solution:

-- Create a view to display full names of employees.
CREATE VIEW EmployeeFullName AS
SELECT employee_id, first_name || ' ' || last_name AS full_name, salary
FROM Employees;

Explanation:

• Purpose of the Query:
• The goal is to compute a new column (full_name) by concatenating first and last names.
• This demonstrates the use of expressions and column aliases in a view.
• Key Components:
• first_name || ' ' || last_name AS full_name : Concatenates two columns with a space in between.
• The SELECT statement determines the structure of the view.
• Real-World Application:
• Simplifies reporting by presenting data in a more user-friendly format.

Notes:

• Computed columns in views are recalculated with each query on the view.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to create a view that concatenates first_name and last_name with a comma and space to form a full name.
• Write a PostgreSQL query to create a view that computes the net price of products after applying a discount percentage.
• Write a PostgreSQL query to create a view that calculates the number of days until each employee's next work anniversary.
• Write a PostgreSQL query to create a view that derives a profit margin column by subtracting cost from revenue and dividing by revenue.

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