How does such bad design and missing constraint get into Dbs that allow duplicates to get into databases in the first place?  Heard of Primary Keys (oh, some people make...

give an example of that dataset.  I think I can help. Send to anup@semiprecious.com as well.

The better thing to do would be to find existing field(s) whose combination will define the entity that table is tracking. Then make that combination or single field a primary...

I have a commment on the definition of the PK.  Why do DB designers make artificial keys as PKs?  You know you can just make it a constraint or a unique...

Without an index, the table has no way to convey information from your client to the server (what you see is records thrown to your screen from a server far...