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发布日期：2022年3月22日
文档最后更新：2025年11月18日
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What do 'real', 'user' and 'sys' mean in the output of time(1)?
...tics
One of these things is not like the other. Real refers to actual elapsed time; User and Sys refer to CPU time used only by the process.
Real is wall clock time - time from start to finish of the call. This is all elapsed time including time slices used by other processes and time the proce...
How to stop mysqld
...sudo /Library/StartupItems/MySQLCOM/MySQLCOM restart
I found that in: https://stackoverflow.com/a/102094/58768
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Naming of ID columns in database tables
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Kevin, same as you. for example: user_id, role_id for PKey, and role_user_id for FKey. It is good on a large scale project. Because if all ID field are named to "id", it is too confuse. But i think it is personal preference, somebody think only use "id" are ...
Sequelize.js: how to use migrations and sync
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email: 'bob@bob.com'
.success (user) ->
console.log 'added user'
user_id = user.id
myTable = [
field1: 'womp'
field2: 'rat'
subModel: [
field1: 'womp'
,
field1: 'rat'
]
]
Remember to take your sync() out of index in your models or it will overwrite w...
Issue with virtualenv - cannot activate
...).
Edit:
The trick here for Windows is not specifying the BAT extension:
PS C:\DEV\aProject\env\Scripts> & .\activate
(env) PS C:\DEV\aProject\env\Scripts>
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How do I paste multi-line bash codes into terminal and run it all at once?
... answered Jul 15 '11 at 21:00
opsguyopsguy
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What's the difference between identifying and non-identifying relationships?
... @Eugene, yes I would expect that to be a non-identifying relationship. user_id should be the primary key by itself, and updated_by is not part of a multi-column primary key.
– Bill Karwin
Jul 29 '11 at 14:18
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How do you uninstall MySQL from Mac OS X?
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ps -ax | grep mysql
*stop and kill any MySQL processes
brew remove mysql
brew cleanup
sudo rm /usr/local/mysql
sudo rm -rf /usr/local/var/mysql
sudo rm -rf /usr/local/mysql*
sudo rm ~/Library/LaunchAgents/homebrew.mxcl.my...
Find (and kill) process locking port 3000 on Mac
...00 is your current port in use)
then check status of the reported PID :
ps ax | grep <PID>
finally, "begone with it":
kill -QUIT <PID>
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