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Maximum length for MySQL type text
... value of a textarea appropriate to the max length of a text field in my MySQL database table. How many characters can a type text field store?
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MySQL indexes - what are the best practices?
I've been using indexes on my MySQL databases for a while now but never properly learnt about them. Generally I put an index on any fields that I will be searching or selecting using a WHERE clause but sometimes it doesn't seem so black and white.
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SQL Server: SELECT only the rows with MAX(DATE)
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For MySql you can do something like the following:
select OrderNO, PartCode, Quantity from table a
join (select ID, MAX(DateEntered) from table group by OrderNO) b on a.ID = b.ID
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How to define a custom ORDER BY order in mySQL
In MySQL how do I define a custom sorting order.
4 Answers
4
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Python executable not finding libpython shared library
...ce configure directives to handle alternate library paths (not everyone is root you know...) In the simplest case all you need is the following:
./configure --enable-shared \
--prefix=/usr/local \
LDFLAGS="-Wl,--rpath=/usr/local/lib"
Or if you prefer the non-linux version...
How to install trusted CA certificate on Android device?
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Prior to Android KitKat you have to root your device to install new certificates.
From Android KitKat (4.0) up to Nougat (7.0) it's possible and easy. I was able to install the Charles Web Debbuging Proxy cert on my un-rooted device and successfully sniff SSL ...
Reading an Excel file in PHP [closed]
... you want to use the data in the excel file. If you want to import it into mysql, you could simply save it as a CSV formatted file and then use fgetcsv to parse it.
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13 个免费学习编程的好地方 - 创意 - 清泛网 - 专注C/C++及内核技术
...同，大多数企业家、威客、运营都会告诉你，学点编程能如何让自己更加成功。过去 曾几何时，懂编程的都是些顶级极客，但是现在，情况已大不相同，大多数企业家、威客、运营都会告诉你，学点编程能如何让自己更加成功...
代码质量：结对编程最不重要的理由 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...新手开发人员加速
在与别人结对时，你不仅能观察他们如何编写代码，还能看到你的结对伙伴是如何面对整个开发流程的：发现哪里需要改变，编写测试，阅读源代码，查找文件，配置开发环境，等等。并且你还可以知道他们...
linux ls、ll命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...读取权限， w ： 表示修改权限， x ： 表示执行权限
1）如何修改文件权限？
u : 当前用户的权限， g ： 当前用户组的权限， o ： 当前其他用户权限
示例：a）给当前用户添加执行权限
chmod u+x text.txt
b）给当前用户组添加写权...