Supported Dialects along with the minimum supported version of the underlying database.

Hibernate version 6.6
Dialect Minimum Database Version

CockroachDialect

22.2

DB2Dialect

10.5

DB2iDialect

7.1

DB2zDialect

12.1

DerbyDialect

10.15.2

GenericDialect

0.0

H2Dialect

2.1.214

HANADialect

1.0.120

HSQLDialect

2.6.1

MariaDBDialect

10.4

MySQLDialect

8.0

OracleDialect

19.0

PostgreSQLDialect

12.0

PostgresPlusDialect

12.0

SQLServerDialect

11.0

SpannerDialect

0.0

SybaseASEDialect

16.0

SybaseDialect

16.0

TiDBDialect

5.4