How to find the number of users connected to a SQL Server database

I was having some intermittent problems with the connector.  When I turned on the connector it would soon be unable to connect to the SQL database.

I was thinking it maybe be had something to do with the SQL server limiting connections.

The code below will show you the amount of connections and how many on each database.  I found it in this forum post

http://stackoverflow.com/questions/216007/how-to-determine-total-number-of-open-active-connections-in-ms-sql-server-2005

SELECT

    DB_NAME(dbid) as DBName, 
    COUNT(dbid) as NumberOfConnections,
    loginame as LoginName
FROM
    sys.sysprocesses
WHERE 
    dbid > 0
GROUP BY 
    dbid, loginame

And this gives the total:

SELECT 
    COUNT(dbid) as TotalConnections
FROM
    sys.sysprocesses
WHERE 
    dbid > 0