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jackallan
Starting Member
2 Posts |
 Posted - 2009-06-09 : 13:27:30
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 OK I'm perplexed by this...I just ran this query:SELECT COUNT(*) FROM Cases WHERE case_installtype IS NULLSELECT COUNT(*) FROM Cases WHERE NOT (case_installtype = 'CRMInstalled' OR case_installtype = '1')And got this result:-----------29018(1 row(s) affected)-----------28(1 row(s) affected)How is this possible!??!?  |
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2009-06-09 : 13:36:07
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| second case it ignores the null valued records altogether. that why you get only 28 rows. |
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2009-06-09 : 13:38:02
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| null is not stored as a value internally. it just represents lack of a defined value |
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vijayisonly
Master Smack Fu Yak Hacker
1836 Posts |
Posted - 2009-06-09 : 13:44:31
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you need to explicitly check for NULL in the second statement likeSELECT COUNT(*) FROM Cases WHERE case_installtype NOT IN ('CRMInstalled' ,'1') OR case_installtype IS NULLquote:
Originally posted by jackallan
OK I'm perplexed by this...I just ran this query:SELECT COUNT(*) FROM Cases WHERE case_installtype IS NULLSELECT COUNT(*) FROM Cases WHERE NOT (case_installtype = 'CRMInstalled' OR case_installtype = '1')And got this result:-----------29018(1 row(s) affected)-----------28(1 row(s) affected)How is this possible!??!?
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2009-06-09 : 13:54:35
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quote:
Originally posted by vijayisonly
you need to explicitly check for NULL in the second statement likeSELECT COUNT(*) FROM Cases WHERE case_installtype NOT IN ('CRMInstalled' ,'1') OR case_installtype IS NULLquote:
Originally posted by jackallan
OK I'm perplexed by this...I just ran this query:SELECT COUNT(*) FROM Cases WHERE case_installtype IS NULLSELECT COUNT(*) FROM Cases WHERE NOT (case_installtype = 'CRMInstalled' OR case_installtype = '1')And got this result:-----------29018(1 row(s) affected)-----------28(1 row(s) affected)How is this possible!??!?
unless you've set ANSI NULLs setting to OFF |
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jackallan
Starting Member
2 Posts |
Posted - 2009-06-10 : 04:28:48
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Thanks guys!  |
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SwePeso
Patron Saint of Lost Yaks
30421 Posts |
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What's going on with this very simple query?