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I have this script(dtsx file) on a sql 2005 server (made by some other technician), some stored procedures update tables with data from views. I can see that these views are based on other views, sometimes 4 to 5 layers thick before hitting the database tables. Would you recommend to improve this construction?
(when confronted with this script i found no documentation, so i don’t know the motivation why this construction is used)
No, I would not recomend you change this, unless there is some logical, or business requirement that you change the structure.
Views on views is quite normal.
Have a read here