>>>>>>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 = ''
>>
>>Thank you!
>
>Remember the old H&R Block TV commercials from the 1970's? "Reason #102 why H&R Block should do your taxes?"
>
>My corollary for this - reason #102 why every database table should have a single column as a primary key definition.
What does PK definition have to do with my question? (btw, I am too young to remember 1970 commercials)
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