HomeHACKERRANK SOLUTIONSRevising Aggregations - The Sum FunctionHackerrank - Revising Aggregations - The Sum Function solutionProblem linkSolution one:SELECT SUM(POPULATION) FROM CITY WHERE DISTRICT = "CALIFORNIA"; PreviousHackerrank - Revising Aggregations - The Count Function solutionNextHackerrank - The Blunder solution