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SELECT * WHERE NOT EXISTS
...r original query will always return nothing unless there are no records at all in eotm_dyn, in which case it will return everything.
Assuming these tables should be joined on employeeID, use the following:
SELECT *
FROM employees e
WHERE NOT EXISTS
(
SELECT null
...
What is the way to quick-switch between tabs in Xcode 4
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I think everybody should assume that people are generally used to browser ~ and use CTR + TAB / CTR + SHIFT + TAB to change tabs.
– Paul Brewczynski
Aug 19 '13 at 14:27
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How to split a string, but also keep the delimiters?
...ve an obvious maximum length" trying to use this with a regex representing all real numbers.
– daveagp
May 28 '14 at 15:00
2
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Using :after to clear floating elements
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The text 'dasda' will never not be within a tag, right? Semantically and to be valid HTML it as to be, just add the clear class to that:
http://jsfiddle.net/EyNnk/2/
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How do I compare version numbers in Python?
...on)
True
>>> version.Version("1.3.xy123")
Traceback (most recent call last):
...
packaging.version.InvalidVersion: Invalid version: '1.3.xy123'
packaging.version.parse is a third-party utility but is used by setuptools (so you probably already have it installed) and is conformant to the c...
Accessing the index in 'for' loops?
... additional state variable, such as an index variable (which you would normally use in languages such as C or PHP), is considered non-pythonic.
The better option is to use the built-in function enumerate(), available in both Python 2 and 3:
for idx, val in enumerate(ints):
print(idx, val)
Ch...
How to output only captured groups with sed?
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Ask your sysadmin to install gsed. You'd be amazed at what a few donuts will get you...
– avgvstvs
Dec 11 '12 at 13:08
3
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How to generate a core dump in Linux on a segmentation fault?
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Well I had a "small" OpenGL project, that once did some weird thing, and caused X-server crash. When I logged back, I saw a cute little 17 GB core file (on a 25 GB partition). It's definitely a good idea to keep the core file's size limited ...
What is PAGEIOLATCH_SH wait type in SQL Server?
...u already have a basic knowledge of SQL, you could read Joe Celko's books (all of them but especially SQL for Smarties and Thinking in Sets) and my blog of course :)
– Quassnoi
Feb 3 '11 at 12:01
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How do you implement a Stack and a Queue in JavaScript?
...ered Oct 19 '09 at 18:19
Corey BallouCorey Ballou
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