In table three columns with 1 milion records(here there is
no sequence values) i want add one more column with
sequence values from the first how it is posible?
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Answer Posted / saraswathi muthuraman
SQL> desc ts_200;
Name Null? Type
----------------------------------------- --------
A NUMBER
SQL> alter table ts_200 add b number;
Table altered.
SQL> desc ts_200;
Name Null? Type
----------------------------------------- --------
A NUMBER
B NUMBER
SQL> select * from ts_200;
A B
---------- ----------
1
3
7
3 rows selected.
SQL> update ts_200 set b=rownum;
3 rows updated.
SQL> select * from ts_200;
A B
---------- ----------
1 1
3 2
7 3
3 rows selected.
| Is This Answer Correct ? | 7 Yes | 3 No |
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