Tracking the name of the column that is changed

hi
How i can track the following information about a table
say i hve the table name tab1 which is like this
col1 col2
1 2
Now if i change the value of col1 by a trigger i can track the change value but how can i track the name of the column
say in the table tab2 i am tracking the result
changed_col_name changed_val prev_val
now changed val and prevval can be tracked by trigger but in the column changed_col_name how i can track the name of the column which i changed?
Thanx in advance

You are being rather unclear here.
If you change the name of a column your trigger will need to be amended. I don't think you're actually asking to track changing actual column names.
What you require is to track value changes and want to know how to assign which value to which column.
each value is associated with a column, therefore if you track that the 5th value in your value clause has changed that means that the column that is affected is the 5th column in your column list.
A simple if block would do the trick.
But probably a better suggestion is to store the rows in a history table.
Each time theres a change insert into the history table (which has its key column based on a sequence or a timestamp)
Then to see whats changed you can merely compare the current row to the previous row

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Thanks for the information.
but if i change the change table then i will miss the other columns right?
I want to get the columns( empid and ename) only if ename is changed. i.e when ever any column in emp table changes i need to get all the columns where the data is changed along with the primary key columns empid.
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<FONT FACE="Arial" size=2 color="2D0000">
You have the answer on hand (user_arguments / all_arguments)!
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DEFAULT_LENGTH NUMBER
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Edited :
or POSITION in argument list,or null for function return value
-SK
</FONT>

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Tracking the name of the column that is changed

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