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SQL syntax, SEL FROM sys.messages WHERE sys.messages.text LIKE ' %NULL%'

Posted on 2016-10-20
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Last Modified: 2016-10-20
EE,

I am trying to SELECT all sys.messages that contain the text string 'NULL'.
First query shows there is at least 1, message_id = 515.
Second query does not return this record.  I assume there are several messages with the word 'NULL'.
I am using SSMS.

Why does this not work or how do I get all the Records with 'NULL' in the string?

Regards
Sam

SELECT *
FROM sys.messages
WHERE message_id = 515
AND language_id = 1033

SELECT *
FROM sys.messages
WHERE
sys.messages.text LIKE ' %NULL%'
AND language_id = 1033
ORDER BY message_id

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Question by:SamCash
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Accepted Solution

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Jim Horn earned 2000 total points
ID: 41852435
>sys.messages.text LIKE ' %NULL%'
My knee-jerk reaction is to lose the spaces between the left quote mark and the first % sign, as they will be included in the search.
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Expert Comment

by:Dave Baldwin
ID: 41852462
If a value is truly NULL, the word NULL will not be found in a string.  That means you can not use LIKE to find it.  This page http://www.w3schools.com/sql/sql_null_values.asp discusses using and finding NULL values.
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Author Closing Comment

by:SamCash
ID: 41852479
Jim,

Thanks much.  This is not the first time a 'space' has kept me going for hours.

Best Regards
Sam
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LVL 66

Expert Comment

by:Jim Horn
ID: 41852515
Thanks for the grade, good luck with your project.  -Jim
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