CREATE OR REPLACE FUNCTION "public"."update_balance_bet"()
  RETURNS "pg_catalog"."trigger" AS $BODY$
    DECLARE
    currentBalance INTEGER;
    BEGIN

    currentBalance = (SELECT balance FROM "public"."Users" WHERE id=NEW."UserId");
    UPDATE "public"."Users" SET balance=(NEW.amount+currentBalance);
    RETURN NEW;
END
$BODY$

CREATE TRIGGER bet_trigger
    AFTER INSERT ON "public"."Bets"
    FOR EACH ROW
    EXECUTE FUNCTION update_balance_bet();