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When and why are database joins expensive?
... scan only when one or more of the following holds.
There are fewer than 200 rows in the relation (in this case a scan will be cheaper)
There are no suitable indexes on the join columns (if it's meaningful to join on these columns then why aren't they indexed? fix it)
A type coercion is required b...
Scroll to the top of the page using JavaScript?
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What is the difference between Integrated Security = True and Integrated Security = SSPI?
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edited Jun 20 '18 at 2:44
Tim
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answered Aug 4 '09 at...
python setup.py uninstall
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edited Jul 22 '19 at 3:02
Matt
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an...
Why does ReSharper want to use 'var' for everything?
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How do I see a C/C++ source file after preprocessing in Visual Studio?
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Cody Gray♦
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answered Nov 10 '08 at 8:33
bk1ebk1e
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Python + Django page redirect
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It's simple:
from django.http import HttpResponseRedirect
def myview(request):
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r...
Pretty-Print JSON in Java
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GSON can do this in a nice way:
Gson gson = new GsonBuilder().setPrettyPrinting().create();
J...
Where are the recorded macros stored in Notepad++?
...opy&paste %AppData%\Notepad++\)
Or:
In Windows < 7 (including Win2008/R2) the macros are saved at C:\Documents and
Settings\%username%\Application Data\Notepad++\shortcuts.xml
In Windows 7|8|10
C:\Users\%username%\AppData\Roaming\Notepad++\shortcuts.xml
Note: You will need to close Note...
MySQL error 2006: mysql server has gone away
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