Delphi Database programming: basics and best practices

[Delphi](/services/delphi development) Database programming: basics and best practices

Opened at: 15. May 2026 | Data are the heart of almost any modern application.

Whether it is a simple address management, a complex ERP system or a mobile app – the ability to efficiently store, retrieve and edit data is crucial.

Delphi has always been one of the leading languages for the development of database-based applications. And for good reason.

This article offers a complete entry into the database programming with Delphi.

We introduce the powerful FireDAC framework, show how you connect to different databases and run through the basic operations (CRUD). We also give you important best practices.

FireDAC: The Universal Data Access Framework

Opened at: 15. May 2026 | Data are the heart of almost any modern application.

Leaders exploring Delphi Database programming: basics and best practices can use Delphi Development, Cost Calculator: Delphi Development, Discover solutions sowie Data Analytics & Business Intelligence as structured entry points.

FireDAC is the modern, powerful and easy-to-use data access framework of Delphi. It offers a uniform API for accessing an impressive variety of databases, including:

• InterBase and Firebird

• MySQL and MariaDB

• Microsoft SQL Server

• PostgreSQL

• Oracle Database

• SQLite

• MongoDB

And many more...

The great advantage of FireDAC is its high speed and ability to optimally use the specific features of each database while providing a consistent programming interface for the developer.

Step 1: Connecting to the database

Short: The connection to a database is a child's play with the FireDAC components.

The connection to a database is a child's play with the FireDAC components. The most important component for this is TFDConnection.

• Place a TFDConnection component: Drag it from the tool pallet to your form or data module.

• ** Double click on the component:** The FireDAC Connection Editor opens.

• ** Select the driver:** In the Driver ID field, select the appropriate driver for your database (e.g. MySQL).

• ** Enter the connection parameters:** Fill out the required fields such as Database, Server, User Name and Password.

• Test the connection: Click the test button. If everything is correctly configured, you will receive a successful message.

• Activate the connection: Set the Connected property on True in the Object Inspector.

Step 2: Query and view data (Read)

To query data from a table, we use the TFDQuery component in combination with a TDataSource and a data-sensitive control element such as TDBGrid.

• Place components: Add a TFDQuery, a TDataSource and a TDBGrid to your form.

• configure TFDQuery: Put the connection property on your TFDConnection component.

• Enter your SQL query in the SQL property editor, e.g.: SELECT * FROM customers.

• TDataSource configuration: Set the DataSet property

References and further reading

The following separate references complement the topics in this article:

• Bitkom – German digital industry association.
• German Federal Office for Information Security (BSI).
• European Commission – Digital strategy.
• MDN Web Docs (Mozilla)
• W3C – World Wide Web Consortium.

"APIs are the backbone of modern systems; stabilise contracts early or pay twice in integration work later."

— Björn Groenewold, Managing Director, Groenewold IT Solutions

Frequently Asked Questions (FAQ)

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This article sums up practical aspects of Delphi Database programming: basics and best practices for leaders and delivery teams. In short: A guide to database programming with Delphi.

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It is especially relevant for firms in Delphi that need reliable systems, clear interfaces, and predictable delivery — from mid-market teams to expert departments.

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