This is a reply after my first reply. I can't use the "$" because
my field is numeric which makes this condition incorrect:

x='11,12,13'
y=1
? transform(y)$x && .T., which is not correct for my criteria.

>Use this instead:
>select * from test where iif(empty(x),.t.,f1$x)
>select * from test where iif(x='none',.t.,f1$x)
>
>>Is this normal VFP (7 or 8) Select-SQL behavior?
>>

>>create cursor test (f1 i)
>>for i = 1 to 10
>>	insert into test values (i)
>>endfor
>>x='1,2,3,4,5'
>>*!*	x=''  && uncomment to cause an error
>>select * from test where iif(empty(x),.t.,f1 in (&x))
>>*!*	x='none'  && uncomment to cause an error
>>select * from test where iif(x='none',.t.,f1 in (&x))
>>