Computed Columns


The configuration in this section is applicable to relational databases in general. The extension methods shown here will become available when you install a relational database provider (due to the shared Microsoft.EntityFrameworkCore.Relational package).

A computed column is a column whose value is calculated in the database. A computed column can use other columns in the table to calculate its value.


By convention, computed columns are not created in the model.

Data Annotations

Computed columns can not be configured with Data Annotations.

Fluent API

You can use the Fluent API to specify that a property should map to a computed column.

class MyContext : DbContext
    public DbSet<Person> People { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
            .Property(p => p.DisplayName)
            .HasComputedColumnSql("[LastName] + ', ' + [FirstName]");

public class Person
    public int PersonId { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string DisplayName { get; set; }