       # of Non-Nulls  # of Nulls  % Nulls     Most Freq. Value  # of Unique  % Unique
col_b               3           1     0.25                    d            2     0.667
col_c               3           1     0.25  2021-01-02 00:00:00            3     1.000
col_d               2           2     0.50           2021-04-02            1     0.500
col_h               3           1     0.25     TestEnum.VALUE_B            2     0.667
col_i               2           2     0.50  2021-04-02 00:00:00            1     0.500
col_j               4           0     0.00                False            2     0.500
col_k               0           4     1.00                 None            0       NaN
col_g               3           1     0.25                    d            2     0.667
