CREATE TABLE table_62886 ("Constituency number" CLOB, "Name" CLOB, "Reserved for  (  SC / ST /None ) " CLOB, "District" CLOB, "Number of electorates  ( 2009 ) " FLOAT)

What's the number of electorates for constituency number 56?
SELECT SUM("Number of electorates (2009)") FROM table_62886 WHERE "Constituency number" = '56'
SELECT SUM("Number of electorates (2009)") FROM "table_62886" WHERE "Constituency number" = '56'