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Is there any way to omit some records in mysql select statement and not deleting them? We can easily add a column for example deleted and set it to 1 for deleted ones and keep them but the problem is that we have to put where deleted = 1 in all queries. What is the best way to keep some records as an archive?

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You basically have two choices. You could use a view to do the filtering though this has some performance issues on MySQL, or you could use a trigger to copy deleted rows into an archive table. I suspect that on MySQL, the trigger solution will be much better (on other DB's the tradeoffs may go other ways.

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Chris Travers: In View mode we will have 2 problems : first we have to make a view for each table and second is Inserts with duplicate key while you can not insert in to a view! and For Triggers , all your foreign keys will fail and again you have to make duplicate table for each table. –  Abadis Feb 25 '13 at 11:00
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Yes, these are problems. The other solution is just to add "and not deleted" to every where clause. There is no free lunch. –  Chris Travers Feb 25 '13 at 11:41
    
I think mysql and other db engines must do sth about this! –  Abadis Feb 25 '13 at 13:41
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You could probably repurpose Oracle's row-level security to do something like it.... –  Chris Travers Feb 25 '13 at 14:18

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