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What is the difference between HAVING and WHERE in SQL?
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Number one difference for me: if HAVING was removed from the SQL language then life would go on more or less as before. Certainly, a minority queries would need to be rewritten using a derived table, CTE, etc but they would arguably...
SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. error
...ror. Numerous configurations of the slf4j-api and logback were tested but none seem to work.
10 Answers
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How to change the session timeout in PHP?
...s works by configuring the server to keep session data around for at least one hour of inactivity and instructing your clients that they should "forget" their session id after the same time span. Both of these steps are required to achieve the expected result.
If you don't tell the clients to forge...
What is the difference between visibility:hidden and display:none?
The CSS rules visibility:hidden and display:none both result in the element not being visible. Are these synonyms?
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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
I'm having a bit of a strange problem. I'm trying to add a foreign key to one table that references another, but it is failing for some reason. With my limited knowledge of MySQL, the only thing that could possibly be suspect is that there is a foreign key on a different table referencing the one I ...
How to make a div 100% height of the browser window
...tinuing design: page 6000px height, with blocks representing pages. I want one block to be exactly the viewport's height.
– Qwerty
Dec 21 '13 at 20:31
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Why aren't pointers initialized with NULL by default?
Can someone please explain why pointers aren't initialized to NULL ?
Example:
15 Answers
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Count rows with not empty value
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For example, the following line makes one single row out of a 2d range of cells, that can often solve a lot of problems: =split(ArrayFormula(concatenate(C3:O4&";")),";") ---- ill keep working on solving the issue
– consideRatio
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What's the “average” requests per second for a production web application?
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Not sure anyone is still interested, but this information was posted about Twitter (and here too):
The Stats
Over 350,000 users. The actual numbers are as always, very super super top secret.
600 requests per second.
Average 200-300 co...
Getting the class name from a static method in Java
How can one get the name of the class from a static method in that class. For example
15 Answers
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