PostgreSQL.
MySQL.
MariaDB.
SQLite, embedded.
Microsoft SQL Server.
Oracle Database.
IBM Db2.
SAP HANA.
Firebird.
CockroachDB — PostgreSQL wire protocol, distributed.
YugabyteDB — PostgreSQL-compatible, distributed.
TimescaleDB — PostgreSQL with hypertables.
Greenplum — PostgreSQL-derived, analytic.
Amazon Redshift — PostgreSQL-derived, columnar.
TiDB — MySQL protocol, distributed.
SingleStore — MySQL protocol, in-memory.
Turso / libSQL — SQLite over the network.
ClickHouse.
DuckDB, embedded and columnar.
Snowflake.
Vertica.
Exasol.
Databricks SQL.
Trino — a query engine over other stores.
CrateDB.
QuestDB — time series.
Google Cloud Spanner.
Every SQL dialect prorm can target.
The value decides which
Dialectimplementation compiles aFindOptionsinto SQL, so it governs identifier quoting, pagination syntax, and which clauses are legal. Spelling it wrong is the one configuration mistake that fails at connect time rather than at compile time —'postgressql'is a perfectly good string — which is why this is worth naming.