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How to 'insert if not exists' in MySQL?
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use INSERT IGNORE INTO table
see http://bogdan.org.ua/2007/10/18/mysql-insert-if-not-exists-syntax.html
there's also INSERT … ON DUPLICATE KEY UPDATE syntax, you can find explanations on dev.mysql.com
Post from bogdan.org.ua according to ...
URL matrix parameters vs. query parameters
I'm wondering whether to use matrix or query parameters in my URLs. I found an older discussion to that topic not satisfying.
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Make a link open a new window (not tab) [duplicate]
Is there a way to make a link open a new browser window (not tab) without using javascript?
5 Answers
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How can I get the active screen dimensions?
...s the equivalent of System.Windows.SystemParameters.WorkArea for the monitor that the window is currently on.
12 Answers
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Difference between numeric, float and decimal in SQL Server
...the float or real data types only if the precision provided by decimal (up to 38 digits) is insufficient
Approximate numeric data types do not store the exact values specified for many numbers; they store an extremely close approximation of the value.(Technet)
Avoid using float or real columns in...
“git rm --cached x” vs “git reset head -- x”?
...an be - the tree, the index and the working copy. When you just add a file to a folder, you are adding it to the working copy.
When you do something like git add file you add it to the index. And when you commit it, you add it to the tree as well.
It will probably help you to know the three more c...
Word wrapping in phpstorm
How can I enable Word wraping in phpstorm? I need to enable it only for some of my files (with extension .txt). Is is possible?
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`from … import` vs `import .` [duplicate]
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It depends on how you want to access the import when you refer to it.
from urllib import request
# access request directly.
mine = request()
import urllib.request
# used as urllib.request
mine = urllib.request()
You can also alias things yourself w...
How to update the value stored in Dictionary in C#?
How to update value for a specific key in a dictionary Dictionary<string, int> ?
7 Answers
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chrome undo the action of “prevent this page from creating additional dialogs”
I sometimes find that I need to re-enable alerting for debugging. Of course I can close the tab and reload it but Is there a better way?
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