Reg: View column datatype

Question

Hi Team,
While creating the views, column automatically converted into varchar2(81) data type from number datatype.
but stage1 table has legacy_trx_number is number data type and statg2 table has header_num is number data type.
Just i added the highlighted part in the view. So automatiicaly converted number to varchar2 datatype. How to keep data type remain the same as source stage table datatype even though those columns used in the view.
CREATE OR REPLACE VIEW test_view  AS
    SELECT h1.legacy_trx_number
      ||'.'
      ||h2.header_num legacy_trx_number,
      h1.legacy_trx_date,
      h1.ledger_id,
      h1.legal_entity_id,
      h1.header_record_identifier,
      h2.header_num,
      h2.gl_date,
      h2.header_value_full,
      h2.header_value
    FROM stage1 H1,
      stage2 H2
  WHERE h1.header_record_identifier = h2.header_record_identifier;
Please help give me suggestion on this.
Thanks in advance.

Answer 1

You can do it like this!
Example:-
SQL> ed
Wrote file afiedt.buf
  1  create view v_num_test
  2  as
  3* select to_number(5478||'.'||87489) result from dual
SQL> /
View created.
SQL> select * from v_num_test;
    RESULT
5478.87489
SQL> desc v_num_test
Name                                      Null?    Type
RESULT                                             NUMBER