How many instances of the database engine can you install on a single server?

How many instances of SQL Server can be installed in a single system?

You can install as many as 50 SQL Server instances on a Windows Server; obviously, we do not recommend this. In a Windows failover cluster, the maximum number of SQL Server instances is reduced by half if you're using shared cluster drives. Only one of the SQL Server instances on a server can be the default instance.

How many databases can we create in a single server?

For SQL Server, the max number of databases you can have on a single SQL Server instance is 32,767.

Can you install multiple instances of SQL Server?

You can install multiple instances of SQL Server, or install SQL Server on a computer where earlier SQL Server versions are already installed. The following SQL Server-related items are compatible with the installation of multiple instances on the same computer: Database Engine.

How many individual instances can be on a single physical machine?

Yes 255 instances can be installed on a single machine.