>>>Hi,
>>>
>>>Is it possible to change some property of a field/column in a SQL Database that automatically sets the value to NULL if the value is an empty string? That is, the application may update the value of a column to an empty string but I want the SQL to set it as NULL.
>>>
>>>TIA
>>
>>This can be done through a trigger. Simple AFTER UPDATE/INSERT trigger can do that.
>
>I will check out how to do it. Thanks.

create trigger trMyTableMyColumnChange after insert, update
as

update myTable set myColumn = null
from myTable inner join Inserted I on myTable.PK = Inserted.PK
where I.myColumn = ''