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Can I have multiple primary keys in a single table?
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A Table can have a Composite Primary Key which is a primary key made from two or more columns. For example:
CREATE TABLE userdata (
userid INT,
userdataid INT,
info char(200),
primary key (userid, userdataid)
);
Update: Here is a link wit...
Combine --user with --prefix error with setup.py install
...ss to. I was trying to take advantage of Python's relatively new per user site-packages directory , and the new option --user . (The option is currently undocumented , however it exists for Python 2.6+; you can see the help by running python setup.py install --help .)
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LINQ Join with Multiple Conditions in On Clause
...ue or false, SecondProperty is an integer and I use AND SecondProperty IN (123, 456). I'll be moving on to that challenge and any help you could give would be greatly appreciated.
– Kuyenda
Oct 5 '11 at 17:03
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Performance surprise with “as” and nullable types
...sible boxed enum types. The JIT compiler generates a call to a CLR helper function named JIT_Unbox_Nullable to get the job done. This is a general purpose function for any value type, lots of code there to check types. And the value is copied. Hard to estimate the cost since this code is locked ...
Usage of sys.stdout.flush() method
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123
Consider the following simple Python script:
import time
import sys
for i in range(5):
p...
Git flow release branches and tags - with or without “v” prefix
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https://semver.org/#is-v123-a-semantic-version
Is “v1.2.3” a semantic version? No, “v1.2.3” is not a semantic
version. However, prefixing a semantic version with a “v” is a common
way (in English) to indicate it is a version numb...
What is “above-the-fold content” in Google Pagespeed?
Until recently, my site (www.heatexchangers.ca) scored 98% on Google Page Speed. There were a couple of things I could do nothing about such as the query string from web fonts. I was very happy with this as this represented all that I could do.
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How are people managing authentication in Go? [closed]
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LastSeenTime <time type> not null
)
When a user logs in to your site via a POST under TLS, determine if the password is valid.
Then issue a random session key, say 50 or more crypto rand characters and stuff in a secure Cookie.
Add that session key to the UserSession table.
Then when you ...
Elevating process privilege programmatically?
... zero days/drive-by downloads (eg a recent one on the official Nobel Prize site). If you browsed to that site and got a UAC prompt, you'd know there was something wrong. With UAC off, you'd never know you just joined a botnet. The cost of the advance warning is having to click Yes occasionally
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How to include an '&' character in a bash curl statement
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123
Putting the entire URL inside double quotes should take care of your problem.
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