Oracle number datatype

Question

All,
I have a question.
I have a field in a table which is a number data type.
This field is of length '9'.
I have a java front end where if I give the last 4 digits of this field I should be able to pull record that matches.
But when I tested for '0000' I don't have any records pulled. Also when i tested for '0111' it did not take the leading '0' and it went to search for '111' and displayed 2 record that ended with 0111 and 1111.
My problem basically is the leading zeros are neglected.
How do i solve this problem? Please help.

Answer 1

You just need to make sure that the variable type passed from jave is appropriate for the way you use it.
Passing a string variable, as Hoek suggested, it would be something like:
SQL> var strvar varchar2(4);
SQL> exec :strvar := '0000'
PL/SQL procedure successfully completed.
SQL> WITH sample_data AS (
  2     SELECT 20110102345678 id, 324560000 pinnumber, 'AAA' firstname, 'ZZZ' lastname
  3     FROM dual UNION ALL
  4     SELECT 20110102345679, 324560111, 'BBB', 'ZZZ' FROM dual UNION ALL
  5     SELECT 20110102345680, 324561111, 'CCC', 'ZZZ' FROM dual UNION ALL
  6     SELECT 20110102345681, 324561234, 'DDD', 'ZZZ' FROM dual)
  7  SELECT * FROM sample_data
  8  WHERE SUBSTR(TO_CHAR(pinnumber, 'fm999999999'), -4) = :strvar
             ID       PINNUMBER FIR LAS
20110102345678       324560000 AAA ZZZ
SQL> exec :strvar := '0111'
PL/SQL procedure successfully completed.
SQL> /
             ID       PINNUMBER FIR LAS
20110102345679       324560111 BBB ZZZ
SQL> exec :strvar := '1111'
PL/SQL procedure successfully completed.
SQL> /
             ID       PINNUMBER FIR LAS
20110102345680       324561111 CCC ZZZOr, as numeric variable, as Frank suggested, it would be like:
SQL> var numvar number;
SQL> exec :numvar := 0;
PL/SQL procedure successfully completed.
SQL> WITH sample_data AS (
  2     SELECT 20110102345678 id, 324560000 pinnumber, 'AAA' firstname, 'ZZZ' lastname
  3     FROM dual UNION ALL
  4     SELECT 20110102345679, 324560111, 'BBB', 'ZZZ' FROM dual UNION ALL
  5     SELECT 20110102345680, 324561111, 'CCC', 'ZZZ' FROM dual UNION ALL
  6     SELECT 20110102345681, 324561234, 'DDD', 'ZZZ' FROM dual)
  7  SELECT * FROM sample_data
  8  WHERE MOD(pinnumber, 10000) = :numvar;
             ID       PINNUMBER FIR LAS
20110102345680       324561111 CCC ZZZ
SQL> exec :numvar := 0111
PL/SQL procedure successfully completed.
SQL> /
             ID       PINNUMBER FIR LAS
20110102345679       324560111 BBB ZZZ
SQL> exec :numvar := 1111
PL/SQL procedure successfully completed.
SQL> /
             ID       PINNUMBER FIR LAS
20110102345680       324561111 CCC ZZZJohn