Web Reference: Nov 18, 2025 · A computed column is a virtual column that isn't physically stored in the table, unless the column is marked PERSISTED. A computed column expression can use data from other columns to calculate a value for the column to which it belongs. In this tutorial, you will learn how to use the SQL Server computed columns to reuse the calculation logic in multiple queries. Oct 4, 2013 · Single definition is easier to maintain than copying it over multiple places. It is doable using CROSS APPLY approach. Of course, the question just didn't show a complex expression really. I was going to say cross apply wasn't available when the question was asked, but 12c had been out a few months by then, I just wasn't aware of it...
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