Why PostgreSQL has rich data types - See It in Action

Explore PostgreSQL's Rich Data Types

📖 Scenario: You are working as a data analyst for a company that collects various types of information about products, including their names, prices, availability dates, and locations. You want to use PostgreSQL to store this data efficiently and accurately.

🎯 Goal: Build a simple PostgreSQL table using different data types to understand why PostgreSQL offers rich data types and how they help store diverse information correctly.

📋 What You'll Learn

Create a table named products with columns using different PostgreSQL data types

Include a product_name column with type VARCHAR(50)

Include a price column with type NUMERIC(10,2)

Include an available_since column with type DATE

Include a location column with type POINT

💡 Why This Matters

🌍 Real World

Companies use PostgreSQL's rich data types to store diverse data like prices, dates, and locations efficiently in one database.

💼 Career

Understanding PostgreSQL data types is essential for database administrators and developers to design robust and scalable databases.

1

Create the products table with basic columns

Write a SQL statement to create a table called products with two columns: product_name as VARCHAR(50) and price as NUMERIC(10,2).

PostgreSQL

-- Create the products table with product_name and price columns
-- Your code here

Need a hint?

Use CREATE TABLE followed by the table name and define each column with its data type inside parentheses.

2

Add a date column for availability

Add a column named available_since with the data type DATE to the existing products table creation statement.

PostgreSQL

CREATE TABLE products (
    product_name VARCHAR(50),
    price NUMERIC(10,2),
    -- Add available_since column here
);

Need a hint?

The DATE data type stores calendar dates without time.

3

Add a location column using the POINT data type

Add a column named location with the PostgreSQL POINT data type to the products table creation statement.

PostgreSQL

CREATE TABLE products (
    product_name VARCHAR(50),
    price NUMERIC(10,2),
    available_since DATE,
    -- Add location column here
);

Need a hint?

The POINT data type stores a geometric point with X and Y coordinates.

4

Complete the table creation with all columns

Ensure the products table creation statement includes all four columns: product_name VARCHAR(50), price NUMERIC(10,2), available_since DATE, and location POINT.

PostgreSQL

-- Verify the full table creation statement is complete
-- Your code here

Need a hint?

Check that all columns and their data types are included correctly.