Databases for Hybrid (HTAP)

Microsoft's flagship RDBMS: T-SQL, columnstore, Always On, and now native vectors and JSON.

The enterprise heavyweight: RAC, Data Guard and a converged engine for SQL, JSON, graph and vectors.

SAP's in-memory columnar HTAP database, the mandatory engine under S/4HANA.

MySQL-compatible distributed SQL with a row store for OLTP and a columnar replica for real-time analytics.

Microsoft's always-current managed SQL Server engine, from free serverless databases to 128 TB Hyperscale.

Distributed SQL mixing in-memory rowstore and columnstore for real-time analytics, search and vectors.

A distributed, memory-first SQL database and compute grid; Ignite 3 rebuilt it around Raft and Calcite.

Open-source distributed SQL from Yandex combining row and column tables, topics and vector search.

Postgres extension that shards tables across nodes for multi-tenant SaaS and real-time analytics.

CNCF-graduated, Raft-replicated transactional key-value store in Rust; the storage layer of TiDB.

Alipay-proven distributed SQL with MySQL (and Oracle, in Enterprise) compatibility, HTAP and vector search.

One of the original relational databases, still sold by Actian for long-lived enterprise systems.

Oracle's engineered system for Oracle Database, with smart storage offload for OLTP and analytics.

Multi-model data platform (SQL, objects, globals, vectors) with built-in interoperability, big in healthcare.

Postgres extension that mirrors tables into Iceberg columnstores for real-time analytics via DuckDB.

The commercial, enterprise-hardened distribution of Apache Ignite for low-latency SQL and compute.

Huawei's distributed enterprise RDBMS built on openGauss, aimed at replacing Oracle in Chinese finance.

China's leading home-grown RDBMS; DM9 (2026) adds distributed, HTAP and AI features.

Huawei-originated open-source RDBMS forked from PostgreSQL, with in-memory and column engines.

MySQL-compatible cloud-native HTAP database on object storage, with vector search and snapshots.

Alibaba's open-source, MySQL-compatible shared-nothing distributed SQL with Paxos and columnar indexes.

Google's Postgres-compatible service with disaggregated storage, a columnar engine and ScaNN vectors.

Alibaba Cloud's shared-storage relational service in MySQL-, PostgreSQL- and Oracle-compatible editions.

Baidu's MySQL-compatible distributed HTAP database on RocksDB and Raft, with full-text and vector indexes.

Oracle's managed MySQL with an in-memory columnar engine for analytics, lakehouse, ML and vector search.

Chinese native distributed graph database for HTAP graph workloads in banking and energy.

Tencent's financial-grade MySQL-compatible database family: distributed TDSQL and cloud-native TDSQL-C.

IBM's enterprise RDBMS for Linux, UNIX, Windows and z/OS, with BLU columnar and pureScale clustering.

Microsoft's globally distributed, multi-API NoSQL and vector database with SLA-backed latency.

Distributed MPP graph database built for deep-link analytics on very large graphs.

PostgreSQL extension that embeds DuckDB's vectorized engine for fast analytics and data-lake queries.

Bitemporal SQL database on object storage that keeps every version of every row.

Self-driving Oracle Database on Exadata: auto-patching, auto-scaling, and Select AI, on OCI and other clouds.