Question

I am trying to run this query but myfield does not contain the full email address, lastname ,phone and email promotion values? It looks like there is a limit on the length of myField?

sql statement:

use adventureworks 
go 

select si.CustomerID, 
'myField' = 
            CASE 
                 When (Select Top 1 FirstName+ ' ' + MiddleName + ' '+ Phone  + ' ' + EmailAddress  +' '+ LastName + ' ' + Phone + ' ' + cast(EmailPromotion as varchar)   From Person.Contact pc Where si.ContactID = pc.contactid ) is not null Then  
            Cast((Select Top 1 FirstName+ ' ' + MiddleName + ' ' + Phone  + ' ' +EmailAddress  +' '+ LastName + ' ' + Phone + ' ' + cast(EmailPromotion as varchar) From Person.Contact pc Where si.ContactID = pc.contactid  ) As varchar) 
            Else '' 
            END 

from Sales.Individual si 
where si.CustomerID=11000 

Answer 1

For varchar[(n)]:

When n is not specified in a data definition or variable declaration
statement, the default length is 1. . When n is not specified with the
CAST function, the default length is 30.

So explicitly specify a suitably long length in your CAST, e.g. varchar(256)

Ref.