15 Days of Learning SQL

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    The key aspect of the task was to calculate eligible hackers who made submissions every day up to and including each specific day (i.e., cumulative submissions). We should check eligible on each day..not for whole range ... so if we have a 2016-03-05 date -> we should check if that hackers submitted from 2016-03-01 to 2016-03-05....e.t.c