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It seems that zero-length strings in an insert statement result in nulls 
in the database.  Either that or the % wildcard is not working.  My 
problem is that when I insert some non-null zero-length string values 
into some columns

e.g. INSERT INTO Foo VALUES ('','','')

an immediate search with wildcards fails

e.g. SELECT * FROM FOO WHERE Col1 LIKE '%%' AND Col2 LIKE '%%' AND Col3 LIKE '%%'

To my understanding % should collaps to "any non-null string value", so 
%% should be matching the zero-length string values.  The second I change 
the insert statement to insert strings consisting of a single space 
character, the select statement works.

Am I doing something wrong here?

Aaron Hamid
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