How to rectify this using a single update query

[pjitu1969]

Suppose i have a table emp with following field name firstname, lastname, salary, age and dept. there is a mistake made while typing names inplace of firstname lastname has been filled and inplace of lastname firstname has been filled. How can we rectify this using a single update query.

[Innila]

Hi pjitu,

The column name can be renamed using ALTER TABLE command as follows,
ALTER TABLE table_name RENAME COLUMN old_column_name TO new_column_name ;
But only a single column can be renamed in a single ALTER TABLE command & if we try to rename more than column name, then ORA-23290 error will be encountered.
ORA-23290: This operation may not be combined with any other operation
Cause: ALTER TABLE RENAME COLUMN/CONSTRAINT operation was given in conjunction with another ALTER TBALE Operation. This is not allowed.
Action: Ensure that RENAME COLUMN/CONSTRAINT is the only operation specified in the ALTER TABLE.

So the column renaming has to be done using more than one ALTER TABLE command.

[pjitu1969]

Thanks a ton