Running Total Column In Table

DECLARE @RunTotal REAL=0
DECLARE @Temp TABLE(ID INT IDENTITY,OrderDate DATE ,OrderAmount REAL ,RunningTotal REAL)
INSERT INTO @Temp (OrderDate ,OrderAmount ,RunningTotal )
SELECT '2016-06-01' ,1500 ,0 UNION ALL
SELECT '2016-06-04' ,2550 ,0 UNION ALL
SELECT '2016-06-05' ,1000 ,0 UNION ALL
SELECT '2016-06-06' ,1250 ,0 UNION ALL
SELECT '2016-06-07' ,1100 ,0 UNION ALL
SELECT '2016-06-08' ,800 ,0 UNION ALL
SELECT '2016-06-11' ,5625 ,0 UNION ALL
SELECT '2016-06-12' ,1235 ,0 UNION ALL
SELECT '2016-06-13' ,555 ,0 UNION ALL
SELECT '2016-06-14' ,985 ,0
-- First Method
-- Running Total Through correlated subquery
SELECT ID ,OrderDate ,OrderAmount ,(SELECT SUM(OrderAmount) FROM @Temp B WHERE A.ID>=B.ID) AS RunningTotal FROM @Temp A
--Second Method
-- Running Total with Help of Variable
UPDATE @Temp SET @RunTotal=RunningTotal=OrderAmount+@RunTotal
SELECT * FROM @Temp