SQL Server String Concatenation with Null

Question

I am creating a computed column across fields of which some are potentially null.

The problem is that if any of those fields is null, the entire computed column will

Answer 1

From SQL Server 2012 this is all much easier with the CONCAT function.

It treats NULL as empty string

DECLARE @Column1 VARCHAR(50) = 'Foo',
        @Column2 VARCHAR(50) = NULL,
        @Column3 VARCHAR(50) = 'Bar';


SELECT CONCAT(@Column1,@Column2,@Column3); /*Returns FooBar*/