February 2 2024

OLAP and OLTP databases: What are they and what are they for?

Exploring OLAP and OLTP databases: differences, uses, and how they can transform operational efficiency and decision making in businesses.


In the digital age, data is considered the new oil, and as such, the ability to manage, analyze and leverage it is critical to the success of any business. Among the various tools available for data management, databases play a crucial role. In particular, OLAP (Online Analytical Processing) and OLTP (Online Transaction Processing) databases represent two sides of the same coin in corporate data management. While both are used to improve operational efficiency and support decision making, they serve very different purposes. In this article, we will explore what OLAP and OLTP databases are, their distinctive features, and how they are used in the day-to-day activities of businesses.

What are OLTP Databases?

Online Transaction Processing (OLTP) is a type of processing that supports application-oriented transactions, characterized by a large number of short online transactions. These transactions include inserting, modifying, and deleting data into databases to support the company's daily operations. OLTP systems are optimized to ensure efficiency in transaction management, speed of execution and data integrity.

Features of OLTP Databases:

  • High Competition: OLTP systems must handle thousands of users and transactions simultaneously, ensuring fast and reliable performance.
  • Short Transactions: Transactions are quick and usually involve a small number of records.
  • Data Integrity: Transaction control mechanisms, such as locking and rollbacks, ensure that transactions are executed securely and that data is consistent.
  • Normalized Database Schema: To minimize redundancy and optimize storage space, OLTP databases are often normalized to third normal form or higher.

Most popular OLTP databases

OLTP databases are designed to handle fast and reliable transactions, being the engine of businesses' daily operations. Here are some of the most popular OLTP systems:

  • OracleDatabase: One of the most popular and powerful relational database management systems, Oracle Database is known for its reliability, scalability, and its capabilities to handle large volumes of transactions.
  • MySQL: A very popular open-source relational database management system, MySQL is widely used for web applications, supporting millions of transactions due to its efficiency and ease of use.
  • Microsoft SQLServer: A relational database operated by Microsoft, SQL Server offers broad capabilities for transaction management, data security, and analytics, making it a popular choice for businesses of all sizes.
  • PostgreSQL: A powerful open source object-relational database management system, PostgreSQL is known for its advanced features, including support for complex transactions, ACID compliance, and extensibility.
  • MongoDB: Although primarily a NoSQL database, MongoDB is also used in OLTP scenarios for applications that require great scalability and flexibility in managing unstructured or semi-structured data, supporting transactions with data integrity across documents.

What are OLAP Databases?

Online Analytical Processing (OLAP) is an approach designed to support complex analysis and queries over large volumes of data. Unlike OLTP systems, which are focused on managing day-to-day transactions, OLAP databases are optimized for data consultation and analysis, making it easy for business users to create reports and analyze them to support decision making.

Features of OLAP Databases:

  • Multidimensional Analysis: The data is organized in OLAP cubes that allow complex analyzes across different dimensions (e.g. time, geography, product).
  • Large Volumes of Data: OLAP databases can handle large volumes of historical data for analysis.
  • Complex Queries: They support complex queries for analyzing trends, patterns and relationships in the data.
  • Denormalized Schema: Unlike OLTP systems, OLAP databases use denormalized schemas (such as the star or snowflake schema) to optimize the performance of analytical queries.

Most famous OLAP databases

In the world of OLAP databases, there are several solutions that have stood out for their performance, scalability and flexibility. Here are some of the best-known OLAP databases:

  • Microsoft SQL Server Analysis Services (SSAS): An enterprise data analytics solution that supports the creation of complex OLAP cubes, data mining, and multidimensional analysis operations. It is integrated with Microsoft SQL Server, providing a robust platform for analytical processing.
  • Oracle Essbase: Originally developed by Hyperion Solutions Corporation, now part of Oracle, Essbase is a multidimensional database widely used for business intelligence, financial planning and analysis applications. It offers advanced functionality for calculating large volumes of financial data.
  • IBM Cognos TM1: Also known as IBM Planning Analytics, it is a financial planning and analytics platform that allows you to build multidimensional data models (cubes) for complex analyses. It is used for planning, forecasting and financial reporting.
  • SAP NetWeaver BW: A powerful data warehousing tool integrated with the SAP ecosystem, which allows you to perform complex analyzes and reporting on company data. It supports the creation of OLAP data models to simplify access and analysis of business information.
  • Pentaho Mondrian: An open-source OLAP database engine that supports multidimensional analysis of business data. Mondrian can be integrated with various data sources and allows the creation of OLAP cubes through its MDX query language.
  • ClickHouse: An open-source columnar database management platform designed for high-speed online analytics (OLAP). ClickHouse stands out for its exceptional query speed on large datasets, supporting real-time analysis on log, transactional or event data. It is particularly suitable for big data scenarios where read performance and data compression efficiency are critical. Thanks to its optimized architecture and ability to execute complex queries quickly, ClickHouse has become a popular choice for businesses that need detailed analytics and real-time reporting.

What are they for?

OLTP: OLTP systems are essential to a company's daily operations. For example, a retail system uses an OLTP database to manage customer transactions, inventory, purchase orders, and other daily operations. The speed and efficiency of OLTP systems allow businesses to ensure smooth and timely management of transactions.

OLAP: OLAP databases, on the other hand, are primarily used for analytical purposes. They enable managers and analysts to extract meaningful insights from data, supporting strategic planning and decision making. For example, a company might use an OLAP system to analyze sales trends, evaluate the performance of specific products in different geographic regions, or to plan marketing campaigns based on customer behaviors.


In conclusion, OLAP and OLTP databases play complementary roles in the enterprise data management landscape. While OLTP systems focus on efficiently managing day-to-day transactions, OLAP databases provide the analytical capabilities needed to extract insights from data that can guide business strategy and decision making. Understanding the differences and specific applications of each type of system is critical to making the most of data to support business objectives. In today's increasingly data-driven world, the ability to effectively integrate both transactional and analytical processing can provide a significant competitive advantage.

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