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difference between primary key and unique key
...ultiple columns, e.g. Primary key (CustomerID, ProductID). This is called composite primary key. This is to clarify the first point, as it might be take as it is (read one key => one column ) by new comer to sql : )
– ken
Apr 10 '14 at 13:53
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How to convert .pfx file to keystore with private key?
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Using JDK 1.6 or later
It has been pointed out by Justin in the comments below that keytool alone is capable of doing this using the following command (although only in JDK 1.6 and later):
keytool -importkeystore -srckeystore mypfxfile.pfx -srcstoretype pkcs12
-destkeystore clientcert.j...
“PKIX path building failed” and “unable to find valid certification path to requested target”
..._22\lib\security\cacerts.
Next import the example.cer file into cacerts in command line:
keytool -import -alias example -keystore C:\Program Files (x86)\Java\jre1.6.0_22\lib\security\cacerts -file example.cer
You will be asked for password which default is changeit
Restart your JVM/PC.
source...
Git Clone: Just the files, please?
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The git command that would be the closest from what you are looking for would by git archive.
See backing up project which uses git: it will include in an archive all files (including submodules if you are using the git-archive-all s...
Web scraping with Python [closed]
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Use urllib2 in combination with the brilliant BeautifulSoup library:
import urllib2
from BeautifulSoup import BeautifulSoup
# or if you're using BeautifulSoup4:
# from bs4 import BeautifulSoup
soup = BeautifulSoup(urllib2.urlopen('http://...
Extreme wait-time when taking a SQL Server database offline
...abase restore from live backup) on my dev database, but the 'Take Offline' command via SQL Server Management Studio is performing extremely slowly - on the order of 30 minutes plus now. I am just about at my wits end and I can't seem to find any references online as to what might be causing the sp...
Writing/outputting HTML strings unescaped
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Do Git tags only apply to the current branch?
...create a tag by e.g.
git tag v1.0
the tag will refer to the most recent commit of the branch you are currently on. You can change branch and create a tag there.
You can also just refer to the other branch while tagging,
git tag v1.0 name_of_other_branch
which will create the tag to the most r...
This app won't run unless you update Google Play Services (via Bazaar)
...ning the new Map API on the emulator is not possible at the moment.
(The comment is from Zhelyazko Atanasov yesterday at 23:18, I don't know how to link directly to it)
Also, you don't see the "(via Bazaar)" part when running from an actual device, and the update button open the Play Store. I am ...