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public function jadwalData()
    {
        return $this->db->table('tbl_jadwal')
        ->join('tbl_hari', 'tbl_hari.id_hari = tbl_jadwal.id_hari', 'LEFT')
        ->join('tbl_karyawan', 'tbl_karyawan.id_karyawan = tbl_jadwal.id_karyawan', 'LEFT')
        ->get()->getResultArray();
    }