I have SQL Server 2008
If I look in the Sql Server Configuration Manager I can see that I have two
instances of SQL server.
These are :
SQL Server(SQLEXPRESS)
SQL Server (MSSQLSERVER) which is SQL Server Standard Edition. This is the
default instance.

Now to my question when I have these two instances of SQL Server is that
like having
two separate installations. I mean it just seems as if I have one
installations of SQL Server(SQLEXPRESS)
and one installation of SQL Server (MSSQLSERVER) which is SQL Server
Standard Edition.

I mean can I just consider these two installations like two different
product in the SQL Servae family.
I want to get a better understanding about what SQl Server instances is

//Tony