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How to select rows with no matching entry in another table?
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Here's a simple query:
SELECT t1.ID
FROM Table1 t1
LEFT JOIN Table2 t2 ON t1.ID = t2.ID
WHERE t2.ID IS NULL
The key points are:
LEFT JOIN is used; this will return ALL rows from Table1, regardless of whether or not there is a matching row in Table2.
The WHERE t2.ID IS NULL clause; this ...
How to set MSDN to be always in English
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edited May 23 '17 at 12:34
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answered Mar 13 '13 at 17:54
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Is there a recommended format for multi-line imports?
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edited Aug 9 '17 at 11:20
answered Jan 17 '13 at 10:45
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Is there a literal notation for an array of symbols?
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2 Answers
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Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
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22 Answers
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Set a path variable with spaces in the path in a Windows .cmd file or batch file
... MY_PATH=C:\Folder with a space
"%MY_PATH%\MyProgram.exe" /switch1 /switch2
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Profiling Django
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Try the Django Debug Toolbar. It will show you what queries are executed on each page and how m...
How do I invoke a Java method when given the method name as a string?
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Detect iPad users using jQuery?
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edited May 23 '17 at 11:47
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answered Jan 6 '11 at 17:17
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