On 8 Feb 2003, at 12:25, Bhavin Vyas wrote:

> So, it could either be ....^www.yahoo.com^(ct value)  or
> .....^^.....(no ct value). I would like that when there is no
> ct value present in the line, the ct value in Log table should
> stay as the default NULL....but it is not. The value becomes ''
> i.e. a zero length string.

If you want to insert a NULL, you have to use the representation of 
NULL that LOAD DATA expects, which is '\N' (a backslash followed by a 
capital N).  So either preprocess your text files to put the '\N' in 
(or create them that way in the first place), or follow your import 
immediately with a query like:

    UPDATE Log SET ct = NULL WHERE ct = '';

Also, if you're not distinguishing between NULL and '' anyway, you 
may want to avoid using NULL at all.  It seems to be increasing the 
complication for no benefit.

-- 
Keith C. Ivey <[EMAIL PROTECTED]>
Tobacco Documents Online
http://tobaccodocuments.org
Phone 202-667-6653

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