Best design for edit tracking?

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Hey all,
This is a general question. Here's my scenario: We have a legacy
database. The core table within contains almost 4 million records in
SQL Server. Currently we have a web front end which allows uses to
search through the database for the information they need.

What the client wants is a web front end which allows some users to
edit the core table above. No problem. What the client also wants is
for the non-editable web front end (used for research) to display (via
colored text) which records have been edited. Example:

1.) Jimmy edits records x, y, and z in coretable1 using the editing
web app.
2.) Jane comes along and uses the research web app to hunt down some
records. She views records s through z. In her view she notices that
certain cells in rows x, y, and z are colored red. This tells her that
Jimmy has edited those specific fields in those specific rows.

My question is: what is the most efficient way to track these column
specific edits so that my web app can display them? This may seem like
a SQL Server question, but the reality is that my web apps have to
interact with SQL Server so if anyone has any input, I'd love to hear
it! Thanks.

.



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