Use rpad to fill default value to a column

    
SQL>
SQL> set echo on
SQL>
SQL> create table t
  2  ( a int,
  3    b varchar2(40) default rpad('*',40,'*'),
  4    c varchar2(30) default rpad('*',30,'*' )
  5  )
  6  /

Table created.

SQL>
SQL> insert into t(a) select rownum from all_users;

14 rows created.

SQL> update t set b = null, c = null;

14 rows updated.

SQL>
SQL> set serveroutput on
SQL>
SQL> exec show_space( 'T' )
Free Blocks
1
Total Blocks
8
Total Bytes
65536
Unused Blocks
6
Unused Bytes
49152
Last Used Ext FileId
1
Last Used Ext BlockId
33145
Last Used Block
2

PL/SQL procedure successfully completed.

SQL>
SQL> insert into t(a) select rownum+1000 from all_users;

14 rows created.

SQL>
SQL> select dbms_rowid.rowid_block_number(rowid), a from t;

DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID)          A
------------------------------------ ----------
                               33146          1
                               33146          2
                               33146          3
                               33146          4
                               33146          5
                               33146          6
                               33146          7
                               33146          8
                               33146          9
                               33146         10
                               33146         11
                               33146         12
                               33146         13
                               33146         14
                               33146       1001
                               33146       1002
                               33146       1003
                               33146       1004
                               33146       1005
                               33146       1006
                               33146       1007
                               33146       1008
                               33146       1009
                               33146       1010
                               33146       1011
                               33146       1012
                               33146       1013
                               33146       1014

28 rows selected.

SQL>
SQL> drop table t;

Table dropped.

SQL>
SQL> --

Related examples in the same category

1.	Override the defaults by specifying a value for the columns
2.	Create table with column having the default value
3.	column with default as sysdate
4.	null with default value column
5.	Default char value
6.	Default varchar value
7.	Use char function to build default column value

Use rpad to fill default value to a column : Column Default Value « Table « Oracle PL / SQL

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