Here are some great MariaDB applications:

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Intelligent Transactions: MariaDB Enterprise supports intelligent transactions (i.e., hybrid transactional/analytical processing or HTAP) by combining row storage optimized for fast transactions with columnar storage optimized for fast analytics. With intelligent transactions, developers can enrich web and mobile applications with real-time analytics, enabling more insightful customer experiences driven by compelling data.
Analytics: MariaDB can be deployed as a data warehouse or analytical database using columnar storage and massively parallel processing (MPP) to perform ad hoc interactive queries on hundreds of billions of rows without creating indexes, and using standard SQL (including joins). Additionally, MariaDB Enterprise implements a cloud-native storage architecture and can optionally use Amazon S3-compatible object storage to reduce costs and take advantage of unlimited capacity. Users can analyze large amounts of data without having to create an index for every possible query.
PostgreSQL Use Cases
With the versatility of PostgreSQL, it is no wonder that giants like usa whatsapp number data Uber, Netflix, and Instagram use PostgreSQL in their backend. Here are some significant use cases of the database:

Geospatial database: When used in conjunction with the PostGIS extension, PostgreSQL supports geographic objects and can be used as a geospatial data store for geographic information systems (GIS) and location-based services. This can be very valuable in developing location-based applications.
Backend database for LAPP stack: An alternative to the LAMP stack, LAPP stands for Linux, Apache, PostgreSQL, and PHP (or Python and Perl). PostgreSQL is part of the LAPP stack and is used as a robust backend database for running dynamic websites and applications.
General-purpose OLTP database: Many large enterprises and startups use PostgreSQL as their primary data store to support their Internet-scale applications, products, and solutions.
MariaDB vs PostgreSQL: A Head-to-Head Comparison
Now it’s time to pit these two database solutions against each other. Let’s explore how MariaDB stacks up against PostgreSQL and vice versa.

Architecture/Document Model
Both MariaDB and PostgreSQL have relational database management systems (RDBMS) as their primary database model.

Its secondary database model is the document store; however, only MariaDB can also incorporate graph DBMSs.