Saved SQL scripts in the database
Day 126 of 149
👉 Full deep-dive with code examples
The Restaurant Kitchen Analogy
Ordering at a restaurant:
- You don't tell the chef each step: "Boil water, add pasta, cook 10 min..."
- You just say: "Spaghetti Carbonara, please"
- The chef already knows the recipe
Stored procedures are recipes stored in the database!
You call them by name instead of writing the steps each time.
The Problem They Solve
Without stored procedures:
- Every app sends complex SQL to the database
- Same logic repeated in multiple places
- If logic changes, update everywhere
- More network traffic
How They Work
You write the procedure once:
Create procedure "GetCustomerOrders":
1. Find customer by ID
2. Get all their orders
3. Sort by date
4. Return results
Then call it:
Execute GetCustomerOrders(customer_id: 123)
The database runs all steps internally!
Benefits
- Faster → Less data sent over network
- Reusable → Call same procedure from anywhere
- Access-controlled → Users can run procedure without direct table access
- Maintainable → Change logic in one place
When To Use Them
Good for:
- Complex operations with multiple steps
- Business logic that should live in database
- Performance-critical queries
- Enforcing consistent data rules
Maybe avoid when:
- Logic changes frequently
- You want portable code across databases
- Simple queries that don't need reuse
In One Sentence
Stored Procedures are pre-written programs saved in the database that you can run by name, like calling a recipe instead of writing all the steps.
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