Find The Number Of Users Connected To A SQL Server DATABASE

SELECT  D_E_S.DATABASE_ID,
DB_NAME(D_E_S.DATABASE_ID) AS DataBaseName,
COUNT(D_E_S.SESSION_ID) AS Total_Connection,
D_E_S.ORIGINAL_LOGIN_NAME AS Org_Login_Name,
D_E_S.HOST_NAME AS ComputerName
FROM SYS.DM_EXEC_SESSIONS D_E_S
WHERE D_E_S.DATABASE_ID = 5
GROUP BY D_E_S.DATABASE_ID,D_E_S.ORIGINAL_LOGIN_NAME,D_E_S.HOST_NAME
ORDER BY 1,2,3