Question

I have a table. it has a column with datatype NUMBER(38,20). it is an id column. out application generates the id. i am trying to insert record with an id value of 105.00010. but it inserts only 105.0001. May i know the reason why it is truncating one value(0). it porperly inserts records from 105.00001 to 105.00009. while inserting 105.00010 it is truncating. Please help me.

column size is **NUMBER(38,20)**

Thanks!

Answer 1

See the following test case:

WITH data_values
  AS (SELECT 105.0001 AS test_val FROM dual
      UNION ALL
      SELECT 105.00010 AS test_val FROM dual)
SELECT test_val,
       TO_NUMBER(test_val, '999.99999') AS NUM,
       TO_CHAR(test_val, '999.99999') AS STR
  FROM data_values;

Results in:

TEST_VAL NUM      STR
105.0001 105.0001 105.00010
105.0001 105.0001 105.00010

The value after the final non zero digit is irrelevent to Oracle. Both your numbers are equivalent.