Home/ Questions/Q 8519287
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-11T06:12:27+00:00

I have an SQL Server table called MyTable with 3 integer columns: column1, column2

  • 0

I have an SQL Server table called “MyTable” with 3 integer columns: column1, column2 and column3. column3 is a computed column, evaluating the expression:

case
when column1>column2 then 1
else 2
end

Let’s say that my table has only one row with values (300, 50, 1)

Now suppose that i have the following LINQ code:

MyTable t = db.MyTables.First();
t.column1=5;
Console.Write("Computed Value = " + t.comlumn3);
db.SubmitChanges();

What will the written output be? 1 or 2? In other words, is the value of the computed column auto-updated in my code, even before I “Submit Changes”;

Thank you in advance.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    No, computed columns are (when declared in the database as you do) only evaluated by the database (ie it will only have the correct value after a save/reload).

    If you want it immediately evaluated in the code and don’t really want the computed column stored in the database, you could change column3 in your datatype into a property that calculates the value in the getter.

    [NotMapped]
public int column3 { get { return column1>column2 ? 1 : 2 } }

    If you’re using EF, you’ll want to add [NotMapped] to your added property to avoid EF trying to store it in the database.

    • 0