model.xml SELECT T1.C1, SUM(T1.C2) OVER (PARTITION BY T1.C1) C2 FROM ( VALUES (CAST(-8.46 AS DOUBLE PRECISION), 30), (CAST(-23.34 AS DOUBLE PRECISION), 15), (CAST(0.0 AS DOUBLE PRECISION), 10), (CAST(0.0 AS DOUBLE PRECISION), 20), (CAST(NULL AS DOUBLE PRECISION), 5), (CAST(-5.22 AS DOUBLE PRECISION), 40), (CAST(-1.08 AS DOUBLE PRECISION), 18) ) T1 (C1, C2) [SQL1].[C1] [SQL1].[C2]