script options:
  $ init com.mysql.jdbc.Driver
  $ db url jdbc:mysql://localhost:3306/xxxxxxxx
  $ db username xxxxxxxx
  $ db password xxxxxxxx

function monety_wczytaj(p: player):
  set {monety::%{_p}%} to index 0 of objects in column "monety" from result of query "SELECT monety FROM gracze WHERE uuid='%uuid of {_p}%' LIMIT 1"

function monety_zapisz(p: player):
  update "UPDATE gracze SET monety=%{monety::%{_p}%}% WHERE uuid='%uuid of {_p}%'"

function monety_dodaj(p: player, n: number, b: boolean=true):
  set {monety::%{_p}%} to {monety::%{_p}%}+{_n}
  if {_b} is true:
    sb({_p}, {scoreboard::%{gracz::%{_p}%}%::monety}, "%{monety::%{_p}%}%&6")

function monety_zabierz(p: player, n: number, b: boolean=true):
  set {monety::%{_p}%} to {monety::%{_p}%}-{_n}
  if {_b} is true:
    sb({_p}, {scoreboard::%{gracz::%{_p}%}%::monety}, "%{monety::%{_p}%}%&6")