Query to find records with more than 2 decimal places

Question

I have written the below query to find records with more than 2 decimal places, but it is returning records with decimal places 1 & 2.
The datatype of the AMT column is NUMBER (without any precision).
SELECT amt  FROM amount_table
WHERE substr(amt, instr(amt, '.')) LIKE '.%'
       AND length(substr(amt, instr(amt, '.') + 1)) > 2Output:-
AMT
*41591.1*
*275684.82*
*64491.59*
*3320.01*
*6273.68*
*27814.18*
*30326.79*
131.8413635
162.5352898
208.5203816
8863.314632
22551.27856
74.716992
890.0158441
2622.299682
831.6683841
*1743.14*
2328.195877
3132.453438
5159.827334
3.236234727
37.784
Thanks

Answer 1

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
create table amount_table
  LINE_NUMBER        NUMBER not null,
  FEE_AMT            NUMBER not null
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (60208, 41591.1);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (60213, 275684.82);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (60238, 64491.59);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (63026, 3320.01);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (59906, 6273.68);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (83111, 27814.18);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (83114, 30326.79);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112395, 131.8413634682);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112399, 162.5352898104);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112402, 208.5203815738);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112403, 8863.3146321954);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112406, 22551.2785551322);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112407, 74.716992);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112410, 890.015844079);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112411, 2622.2996817048);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112414, 831.6683840698);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112415, 1743.14);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112418, 2328.1958771886);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112419, 3132.4534379886);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112422, 5159.8273341686);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112423, 3.2362347266);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112426, 37.784);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112427, 198.7423503696);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112430, 0.7220848332);
insert into amount_table (LINE_NUMBER, FEE_AMT)
values (2112433, 12.4149375254);