What Are Validation Rules in Salesforce? | How Validation Rules Work | Salesforce Tutorial

What are Validation Rules in Salesforce, and how do they work?

Validation Rules are an important Salesforce feature used to ensure that the data entered into a record meets specific business requirements before the record is saved.

In this tutorial, we explain Validation Rules in a simple, step-by-step manner, including how the formula works, when an error message appears, and how to create a Validation Rule in Salesforce.

🧠 What You’ll Learn

✅ What is a Validation Rule in Salesforce?
✅ Why Validation Rules are used
✅ How Validation Rules work
✅ Understanding the TRUE/FALSE logic
✅ How an error-condition formula works
✅ How Validation Rules prevent incorrect data
✅ How to create a Validation Rule
✅ How to add a custom error message
✅ How to check the formula syntax
✅ How to save and activate a Validation Rule

💡 Example: Prevent a Negative Opportunity Amount

Suppose you want to prevent users from entering a negative amount on an Opportunity.

Formula:
Amount 0

If the formula evaluates to TRUE, Salesforce considers the data invalid, displays the error message and prevents the record from being saved.

If the formula evaluates to FALSE, the record can pass the Validation Rule and be saved.

🛠️ Steps to Create a Validation Rule

Go to Setup

Open Object Manager

🔑 KEY TAKEAWAY

TRUE = Invalid data → Record is blocked
FALSE = Rule condition is not triggered → Record can be saved

Validation Rules help maintain clean, accurate and reliable data in Salesforce and can be created for both standard and custom objects.

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