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To maintain Audit log for Employee table

 
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karthi_ind

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Joined: 24 Feb 2004
Posts: 131
Location: Chennai

PostPosted: Wed Mar 10, 2010 11:59 am    Post subject: To maintain Audit log for Employee table
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I have one table called Employee and detail would like below

EMP_TABLE
S.No Emp_Id EmP_Name Emp_Salary
1 123 John 100
5 123 Sunil 100
7 123 Raj 500
10 123 Joseph 101

When ever i do the update on the columns like Emp_Name or Emp_Salary a new record is inserted into the same table with new S.No
For Ex. Emp_Name "John" Changed to "Sunil" new record is inserted into the table with S.No"5".

Note:Emp_ID will remain same and it can't be changed/updated.

Now My requirement is "I should generate the report(using Cursors in SQL Stored procedure) for audit log" for the "employee_Id 123" The report should be like below

Changed Field Old Value New value
Employee Name John Sunil
Employee Name Sunil Raj
Employee Nmae Raj Joseph
Employee Salary 100 500
Employee Salary 500 101
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GuyC

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Joined: 11 Aug 2009
Posts: 1278
Location: Belgium

PostPosted: Wed Mar 10, 2010 4:37 pm    Post subject:
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well, good luck with that. It won't be easy.
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sushanth bobby

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Joined: 29 Jul 2008
Posts: 1013
Location: India

PostPosted: Wed Mar 10, 2010 5:03 pm    Post subject:
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Karthi,

You got to be kidding me !
Quote:
a new record is inserted into the same table with new S.No

Single table holding employee records & audit records as well. Did normalization went for a vacation or what ?

Sushanth
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ashimer

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Joined: 13 Feb 2004
Posts: 551
Location: Bangalore

PostPosted: Wed Mar 10, 2010 5:10 pm    Post subject:
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True - you should have been using another table for audit with a trigger on the base table.
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dick scherrer

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Joined: 23 Nov 2006
Posts: 19270
Location: Inside the Matrix

PostPosted: Wed Mar 10, 2010 9:26 pm    Post subject:
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Hello,

I suspect this is the audit table. . . I may misunderstand, but i believe the requirement is to show all of the before/after values when there have been modifications.

Possibly Karthi will clarify. . .
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karthi_ind

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Joined: 24 Feb 2004
Posts: 131
Location: Chennai

PostPosted: Thu Mar 11, 2010 12:26 pm    Post subject: Reply to: To maintain Audit log for Employee table
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Hi all,

Thanks for your reply.

Basically what I want is the report kind of thing which tells about what are all the changes done in the table. Like empname has been changed to new name, salary has been changed to new one. This needs to be done using sql query in stored procedure.

Sushanth,

The table contains multiple records and I want only the changes done for name and salary. so I dont think normalization comes into picture on this.

Please clarify.

Thanks.
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GuyC

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Joined: 11 Aug 2009
Posts: 1278
Location: Belgium

PostPosted: Thu Mar 11, 2010 1:56 pm    Post subject:
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You could use this as starting point :
Code:
select old.id, old.no, old.name, old.sal, new.no,new.name, new.sal
from EMP_TABLE old
      , EMP_TABLE new
where old.id = new.id
  and (   old.Name = new.name
       or old.sal  = newt.Sal)
  and new.no = (select min(no) from EMP_table nxt
                 where old.id = nxt.id
                   and nxt.no > old.no
                )
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GuyC

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Joined: 11 Aug 2009
Posts: 1278
Location: Belgium

PostPosted: Thu Mar 11, 2010 4:38 pm    Post subject:
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in previous post, ofcourse it must be

(old.name <> new.name or old.sal <> new.sal)
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