> 'health'<>'' (if that is what you have) means a boolean expression that
> compares the
> literal 'health' with the empty literal '' which is of course always false.
Ah. Gotcha. Thanks. I didn't know you could use a single double
quotation mark in a query -- I thought like in most languages that you
needed two of them for it to be valid.
> Maybe *health* is a column name somewhere ? In this case it should be
> written :
> "health" <> '' (i.e. comparison between the value of column "health" and the
> literal value '')
'health' is one of the accepted values of the page table's
"Classification" column.
Many thanks,
-David
