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Oracle Time Stamp

Posted on 1998-05-10
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Last Modified: 2008-02-01
Is there a way we can put a column in 'history' table that would keep the time, at which transaction x was commited?
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Question by:kgkhan
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xiaodong earned 200 total points
ID: 1080979
Absolutely.
Add a colume with data type of Date.
Whenever you insert/update a record, insert/update the column with the value of sysdate.
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by:manand062397
ID: 1080980
As Xiaodong said add new field for date field and do the followings

1. Use Trigger to update new field automatically on insert/update of record.

2. If you do not update records in history table then user default sysdate to update date and time of insertion.  

If you do not update history records then I recommend second method because there is no coding.
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Expert Comment

by:sganta
ID: 1080981
You follow the following steps

1. To include column in the history table using the following syntax
    SQL >     ALTER TABLE history ADD (record_date DATE);
2. Now write a DATA BASE TRIGGER for history which will take care to insert or update
   the  RECORD_DATE by using the following SYNTAX

   CREATE TRIGGER history_trigger
   BEFORE INSERT OR UPDATE ON history FOR EACH ROW
   BEGIN
       :NEW.record_date := SYSDATE;
   END;
3. Execute the above trigger which will fire whenever you insert or update the record
   and change the  update the committed time accordingly.

Since the question is locked, I could'nt able to answer you.

This is tested and it works fine
I hope this is acceptable to you - sganta


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Expert Comment

by:sganta
ID: 1080982
Hello !

I have posted my answer as a comment. Since the Question is locked, I could'nt able
to put in to answer column.

If you are interested in xiaodong's answer please accept this. Otherwise
reject this. If you are not interested in my answer (comment). Send a comment
so that another expert can give better solution. You've taken so much time.
What happened ?
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