Question

How to create a computed column based on the Title nvarchar(max) column of another table?

I want to make Title in table 1 a computed column from table2 based on docId = DocId. I keep trying to add it as computed column in SSMS and it won’t let me.

Table1

AssetId  Title   DocId
========================

Table2

DocId  Title      
=========================
5      Disaster       
10     Recovery        
15     Pending      

Answer 1

You can’t create computed column using another table column. But you can define Table 1 as
AssetId, DocId and create view as you desired.

CREATE VIEW YouVIEW
AS
SELECT T1.AssetId, T1.DocId, T2.Title
FROM Table1 T1
    JOIN Table2 T2
       ON T1.DocId = T2.DocId

This is parametrized inline function

CREATE FUNCTION dbo.GetValue (@DocId INT)
RETURNS TABLE
AS
RETURN
    (SELECT T1.AssetId, T1.DocId, T2.Title 
     FROM Table1 T1 
        JOIN Table2 T2 
           ON T1.DocId = T2.DocId 
     WHERE T1.DocID = @DocId
    )
GO