How many databases or schemas can I run within a DB instance? - Leading USA Blockchain & Software Development Company

RDS for Amazon Aurora: No limit imposed by software
RDS for MySQL: No limit imposed by software
RDS for MariaDB: No limit imposed by software
RDS for Oracle: 1 database per instance; no limit on number of schemas per database imposed by software
RDS for SQL Server: 30 databases per instance
RDS for PostgreSQL: No limit imposed by software