Hi, **Question:** I would like to calculate the winAmount and POP for each of the betAmount values, but some of the data is only available in the 'pre purchase bal' and rest is available in 'completed final bal'. **Sample data:** ``` event,betAmount,winAmount,endBalance Purchase Started Pre Purchase Balance,0.25,, Game Completed Final Balance,,0.0,299.75 Purchase Started Pre Purchase Balance,0.25,, Game Completed Final Balance,,0.5,300.0 Purchase Started Pre Purchase Balance,0.25,, Game Completed Final Balance,,0.0,299.75 Purchase Started Pre Purchase Balance,1.0,, Game Completed Final Balance,,0.6,299.35 Purchase Started Pre Purchase Balance,1.0,, Game Completed Final Balance,,0.2,298.55 Purchase Started Pre Purchase Balance,1.0,, Game Completed Final Balance,,0.6,298.15 ``` **Query:** ``` SELECT purchasesbyba, wager, betamount, purchasesbyba, winamount, (winamount+ pw) / wager * 100.0 AS pop FROM ( SELECT event, count( CASE WHEN( event IS 'Game Completed Final Balance') THEN 1 ELSE NULL END) AS 'purchases', sum(mga.betamount) AS wager, sum(mga.winamount) AS winamount, sum(mga.progressivewin) AS pw, count( CASE WHEN( event IS 'Game Completed Final Balance' AND winamount != 0.0 ) THEN 1 ELSE NULL END) AS wins, betamount, count(betamount) purchasesbyba FROM mgaccounting AS mga GROUP BY betamount ); ``` **Results so far:** ``` purchasesbyba,wager,betamount,purchasesbyba,winamount,pop 0,,,0,6637.20000000004, 2236,559.0,0.25,2236,, 1141,570.5,0.5,1141,, 1316,1316.0,1.0,1316,, 1278,1917.0,1.5,1278,, 1123,2807.5,2.5,1123,, ``` Thank you for any pointers!