This will bring back totals per property and type
SELECT PropertyID,
TYPE,
SUM(Amount)
FROM yourTable
GROUP BY PropertyID,
TYPE
This will bring back only active values
SELECT PropertyID,
TYPE,
SUM(Amount)
FROM yourTable
WHERE EndDate IS NULL
GROUP BY PropertyID,
TYPE
and this will bring back totals for properties
SELECT PropertyID,
SUM(Amount)
FROM yourTable
WHERE EndDate IS NULL
GROUP BY PropertyID
……