Question

I want to set the value of a column based on another column’s value by using Computed Column Specification in SQL Server.

Basically I want to set the columns’ value to be a link if it has a result associated (in another column). This is what I tried putting in the formula part of that column but I always get this

Error Validating formula

T-SQL code:

SELECT 
    CASE 
       WHEN D.TestResultId IS NOT NULL 
       THEN ('<a href="Analysis?Result=' + CONVERT(varchar(max), D.TestResultId) + '">Analysis</a>')
       ELSE 'Pending Analysis' 
    END
FROM DailyReport AS D

The query by itself is working fine, but when put in that into the computed column specification it always returns that error. I even tried creating a stored procedure and calling it, but still the same issue. Can I get any help on this?

Answer 1

You don’t need the SELECT - FROM part on the computed column. It should just be:

CASE WHEN TestResultId IS NOT NULL 
THEN ('<a href="Analysis?Result=' + CONVERT(varchar(max), TestResultId) +
'">Analysis</a>') ELSE 'Pending Analysis' END