HKEYS and HVALS in Redis - Mini Project: Build & Apply

Using HKEYS and HVALS in Redis

📖 Scenario: You are managing a small online store's inventory using Redis. You want to store product details in a hash and then retrieve all the product names and their prices separately.

🎯 Goal: Build a Redis hash to store product names and prices, then use HKEYS to get all product names and HVALS to get all prices.

📋 What You'll Learn

Create a Redis hash called products with exact entries: "apple": "1.20", "banana": "0.50", "cherry": "2.00"

Set a variable hash_name to the string "products"

Use the HKEYS command on products to get all product names

Use the HVALS command on products to get all product prices

💡 Why This Matters

🌍 Real World

Redis hashes are useful for storing related data like product details, user profiles, or settings in a fast and organized way.

💼 Career

Knowing how to use Redis hashes and commands like HKEYS and HVALS is valuable for backend developers and database administrators working with caching and fast data retrieval.

1

DATA SETUP: Create the Redis hash with product data

Create a Redis hash called products with these exact entries: "apple": "1.20", "banana": "0.50", and "cherry": "2.00" using the HSET command.

Redis

# Use HSET to create the products hash with the given entries
# Your code here

Need a hint?

Use HSET followed by the hash name products and then pairs of field and value.

2

CONFIGURATION: Set the hash name variable

Set a variable called hash_name to the string "products".

Redis

HSET products apple 1.20 banana 0.50 cherry 2.00
# Set hash_name variable to "products"
# Your code here

Need a hint?

Use the SET command to assign the string "products" to hash_name.

3

CORE LOGIC: Retrieve all product names using HKEYS

Use the HKEYS command on products to get all the product names stored in the hash.

Redis

HSET products apple 1.20 banana 0.50 cherry 2.00
SET hash_name "products"
# Use HKEYS products to get all product names
# Your code here

Need a hint?

Use HKEYS followed by the hash name to get all keys (product names).

4

COMPLETION: Retrieve all product prices using HVALS

Use the HVALS command on products to get all the product prices stored in the hash.

Redis

HSET products apple 1.20 banana 0.50 cherry 2.00
SET hash_name "products"
HKEYS products
# Use HVALS products to get all product prices
# Your code here

Need a hint?

Use HVALS followed by the hash name to get all values (product prices).