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New Depends on what he means by a "blank string"
My solution said that nulls are not blanks. If you are willing to accept them, then just:

TRIM(x) IS NULL

Cheers,
Ben
"good ideas and bad code build communities, the other three combinations do not"
- [link|http://archives.real-time.com/pipermail/cocoon-devel/2000-October/003023.html|Stefano Mazzocchi]
New Empty strings is what I meant. :-)
Thanks.
     Need Oracle "isBlank" boolean test - (tablizer) - (7)
         Blank Strings are null? - (ChrisR) - (2)
             Depends on what he means by a "blank string" - (ben_tilly) - (1)
                 Empty strings is what I meant. :-) - (ChrisR)
         TRIM(NVL(x, 'NULL')) IS NULL - (ben_tilly) - (3)
             Why the NVL? - (ChrisR) - (2)
                 What I thought that he wanted... - (ben_tilly) - (1)
                     understood. thanks. -NT - (ChrisR)

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