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What's the difference between using INDEX vs KEY in MySQL?
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When looking at table info in the latest version of SQLYog it shows KEY keyname (column_name) when I created the table with INDEX keyname (column_name). The fact that it is a synonym explains it perfectly.
– crmpicco
Apr 2 '14 at 10:10
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Database, Table and Column Naming Conventions? [closed]
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I recommend checking out Microsoft's SQL Server sample databases:
https://github.com/Microsoft/sql-server-samples/releases/tag/adventureworks
The AdventureWorks sample uses a very clear and consistent naming convention that uses schema names for the organizatio...
Checking if a field contains a string
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https://docs.mongodb.com/manual/reference/sql-comparison/
http://php.net/manual/en/mongo.sqltomongo.php
MySQL
SELECT * FROM users WHERE username LIKE "%Son%"
MongoDB
db.users.find({username:/Son/})
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关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...来看以不同io模型来实现一个socket（io） server的功能
1、使用 accept 阻塞的古老模型：属于同步阻塞 IO 模型，代码如下：
socket_server.php
<?php
/**
* SocketServer Class
* By James.Huang <shagoo#gmail.com>
**/
set_time_limi...
LINQ - Left Join, Group By, and Count
Let's say I have this SQL:
5 Answers
5
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Simple calculations for working with lat/lon and km distance?
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Why not use properly formulated geospatial queries???
Here is the SQL server reference page on the STContains geospatial function:
https://docs.microsoft.com/en-us/sql/t-sql/spatial-geography/stcontains-geography-data-type?view=sql-server-ver15
or if you do not waant to use box and radian...
Entity Framework .Remove() vs. .DeleteObject()
...tate is Deleted after that.) If you call SaveChanges afterwards EF sends a SQL DELETE statement to the database. If no referential constraints in the database are violated the entity will be deleted, otherwise an exception is thrown.
EntityCollection.Remove(childEntity) marks the relationship betwee...
Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ldd /path/to/nginx
libluajit-<VERSION>.so => not found
此类问题通常使用ldconfig命令就能解决：
shell> echo "/usr/local/lib" > /etc/ld.so.conf.d/usr_local_lib.conf
shell> ldconfig
再试着启动Nginx看看，应该就OK了。
应用
我们先用一个简单的程序来暖暖...
MySQL Error 1153 - Got a packet bigger than 'max_allowed_packet' bytes
I'm importing a MySQL dump and getting the following error.
14 Answers
14
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How to convert an entire MySQL database characterset and collation to UTF-8?
How can I convert entire MySQL database character-set to UTF-8 and collation to UTF-8?
19 Answers
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