RE: Insert of null-values with RPG, SQL or DFU

[Buck Calabro <buck.calabro@xxxxxxxxxxxxxxxxx>]

John Carr wrote:

<SNIP>
>>One thing that you must realize is that NULL is not a value - it is an
>>attribute.  A column can have a value of 1.00 and also an attribute of
>>NULL.
>>SQL "masks" this by not displaying the value if NULL is set.  We're forced
>>so either use the null map or %nullind for each field.
>>Buck Calabro

>Are you sure about the SQL comment?  

I'm pretty sure.  I think we're agreeing here, but (as usual) my postings
aren't clear enough.  Here's an example of what I meant when I said that SQL
"masks" the value:

(all columns are null capable and default to null)
INSERT INTO BUCK/BUCK1 (BREAKLVL) VALUES('x')
select * from buck1   
  (shows me "x" and dashes for the null columns)
UPDATE BUCK/BUCK1 SET HRHXCD = 'y' WHERE breaklvl='x'
select * from buck1
  (shows me the "y" in this column)
UPDATE BUCK/BUCK1 SET HRHXCD = NULL WHERE breaklvl='x' 
select * from buck1
  (shows the dash for this column even though it does have a value)

Buck Calabro
Aptis; Albany, NY
"We are what we repeatedly do.
 Excellence, then, is not an act, but a habit." --Aristotle


Billing Concepts Corp., a NASDAQ Listed Company, Symbol: BILL
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