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Mastering AL Programming in Business Central: From Basics to Advanced


Unlock the full potential of Microsoft Dynamics 365 Business Central by mastering AL programming. This comprehensive guide takes you from the basics to advanced techniques, covering essential topics such as code units, procedures, queries, triggers, and more. Whether you are a beginner or an experienced developer, this structured content will help you enhance your skills and build powerful extensions for Business Central.

If you are an aspiring Business Central developer, check out this e-book: 

For Indian residents: AL Mastery in 3 Weeks: A Programmer's Boot Camp.

For Other countries: AL Mastery in 3 Weeks: A Programmer's Boot Camp

If you are preparing for an interview, explore this resource: 

For Indian Residents: Business Central Technical Interview Preparation.

For Other countries: AL Mastery in 3 Weeks: A Programmer's Boot Camp

If there's anything missing in the table below, please let me know in the comments.

Basic Level


Concepts/Link Reference

(Click the link to learn the concept)


Introduction to AL Programming

Overview of Business Central

AL language

Setting up the development environment


Getting Started with AL

Creating a new AL project

Understanding the project structure and key files




Basic Syntax and Data Types

Variables and data types

Basic syntax and operators

Control structures

if statements


for do

 For Each

While Repeat



Tables and Fields

Creating and modifying tables

Defining fields and data types

Primary keys and indexing

Table triggers (OnInsert, OnModify, OnDelete)



Pages and UI Design

Creating pages (Card, List, Worksheet)

Page properties and layout customization

Part 1

Part 2

Simple actions and triggers

Triggers in AL

Table Triggers


Basic Codeunits and Functions

Introduction to codeunits

Creating and calling functions (procedures)

Error handling basics

Intermediate Level





Advanced Table Concepts

Table relations and lookup fields

Validations and triggers (OnInsert, OnModify, OnDelete)

Temporary tables and buffer tables





Advanced Pages and UI Customization

Complex page design

Role Center Page: Navigation Menu and Bar

Action Bar

Card Part

Headline part

List Part


Handling page events and triggers

Event Types


Codeunits and Business Logic

Writing complex business logic in codeunits

Defining and using local and global procedures

Error handling and debugging


Field Error and Error method


Reports and Document Layouts

Designing reports with RDLC and Word layouts

RDLC Introduction

RDLC from Multiple Tables



Report triggers and data handling

Queries and Data Retrieval

Creating and using queries

Advanced data retrieval techniques

Types of Joins

Complex Query


Advanced Level



Event-Driven Programming

Understanding and using events and subscribers

Creating and handling custom events

Best practices for event-driven design

Extensions and Upgrades

Developing and publishing AL extensions

Handling extension versioning and upgrades

Managing dependencies and breaking changes

Integration and Web Services

Consuming and exposing web services (SOAP, OData)

REST API integration

Handling authentication and security

Advanced AL Features

Using advanced AL features (Enums, Interfaces)

Customizing the application lifecycle management (ALM)

Part 1

Azure DevOps

Intro to GitHub

Implementing automated testing and CI/CD pipelines

Performance Tuning and Optimization

Identifying and resolving performance bottlenecks

Advanced indexing and query optimization

Best practices for efficient AL code

Customization and Localization

Advanced customization techniques

Handling multi-language and localization

Customizing Business Central for different regions



Mastering AL programming in Business Central opens up a world of opportunities for developers. By understanding the basics, diving into intermediate concepts, and exploring advanced techniques, you can create powerful and efficient solutions. Keep learning and experimenting to stay ahead in the ever-evolving field of Business Central development.

If you found this guide helpful, don't forget to share it with your network! 😊🚀 If there's anything missing or if you have any questions, please let me know in the comments below. Happy coding! 💻✨

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