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NULL Versus Blank
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Member
posted
If I've got a database record where the column 'type_cd' column is NULL, would that record be returned in a webfocus query where clause like:

WHERE TYPE_CD EQ ''

???

If not, how do you query on NULL column values?
 
Posts: 19 | Registered: October 24, 2006Report This Post
Member
posted Hide Post
Nevermind. I figured it out. I have to use:

WHERE TYPE_CD EQ '%NULL%'
 
Posts: 19 | Registered: October 24, 2006Report This Post
Expert
posted Hide Post
say Chris, tell us what kind of database you're reading, would you?




In Focus since 1979///7706m/5 ;wintel 2008/64;OAM security; Oracle db, ///MRE/BID
 
Posts: 3811 | Location: Manhattan | Registered: October 28, 2003Report This Post
Platinum Member
posted Hide Post
use SET ALL=PASS
and then use a selection test that no other records will pass.
with ALL=PASS, null or missing values are considered to pass any selection tests.
 
Posts: 140 | Location: Adelaide South Australia | Registered: October 27, 2006Report This Post
Expert
posted Hide Post
adelaide,
i do believe all=pass is a bit different, for a JOIN where no screening condition is applied that would affect a field in the guest file, hence the pass; a different interpretation from suggesting that screening conditions of any kind would be obviated by it use.
-s.




In Focus since 1979///7706m/5 ;wintel 2008/64;OAM security; Oracle db, ///MRE/BID
 
Posts: 3811 | Location: Manhattan | Registered: October 28, 2003Report This Post
Guru
posted Hide Post
Try:
WHERE TYPE_CD IS MISSING


ttfn, kp


Access to most releases from R52x, on multiple platforms.
 
Posts: 346 | Location: Melbourne Australia | Registered: April 15, 2003Report This Post
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