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Does Foreign Key improve query performance?
...the foreign key relationship already inforces that for you.
So this:
select p.ProductId, p.Name, c.CategoryId, c.Name AS Category
from Products p inner join ProductCategories c on p.CategoryId = c.CategoryIdwhere c.CategoryId = 1;
Becomes this:
SELECT p.ProductId, p.Name, c.CategoryId, c.N...
How to search for occurrences of more than one space between words in a line
...
This regex selects all spaces, you can use this and replace it with a single space
\s+
example in python
result = re.sub('\s+',' ', data))
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Disabling Chrome cache for website development
...ck (or hold left click) on the reload button at the top of the browser and select "Empty Cache and Hard Reload."
This will go beyond "Hard Reload" to empty the cache entirely, ensuring that anything downloaded via javascript or etc. will also avoid using the cache. You don't have to mess with set...
Disable ALL CAPS menu items in Visual Studio 2013
... menus back.
First Variant: Since Package Manager Console is Powershell, select menu options TOOLS / Library Package Manager / Package Manager Console and enter and run
Set-ItemProperty -Path HKCU:\Software\Microsoft\VisualStudio\12.0\General -Name SuppressUppercaseConversion -Type DWord -Value 1...
Internet Explorer 8 Developer Tools not displaying
... You
should get a window floating at the edge of the screen. Type M to
select Move, then press an arrow key to enter Move mode.
Additional remark by @WebSolProv:
It would appear that something happens with IE that causes the developer tools window to be shrunk to the height of the header b...
LINQ with groupby and count
...(var line in data.GroupBy(info => info.metric)
.Select(group => new {
Metric = group.Key,
Count = group.Count()
})
.OrderBy(x => x.Metric))
{
Console.Wri...
Accessing class variables from a list comprehension in the class definition
... a positional argument, the range(1) iterable to use for its looping code, cast to an iterator. As shown in the bytecode, range(1) is evaluated in the class scope.
From this you can see that the only difference between a code object for a function or a generator, and a code object for a comprehensi...
How to suppress Java warnings for specific directories or files such as generated code
...rce
Announced here: Eclipse 3.8 and 4.2 M6 - New and Noteworthy, called Selectively ignore errors/warnings from source folders. That's also where the screenshot is from. This is the new feature developed on the previously linked Bug 220928.
...
How can I connect to MySQL in Python 3 on Windows?
...k', user='root', passwd=None, db='mysql')
cur = conn.cursor()
cur.execute("SELECT Host,User FROM user")
for r in cur:
print(r)
cur.close()
conn.close()
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How to use a switch case 'or' in PHP
...le switch(), and when I'm working in a C-ish language I really miss having Select Case, which is really a shorthand way of saying "there's a big block of if, else if, else-if... here".
– Stan Rogers
Oct 9 '10 at 7:50
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