二维数组储存至数据库问题
我想将一个二维的数组的值储存到mysql数据库中不知如何做,例:
字段:name age sex
数组:array(array(sh,20,男),array(se,30,女));
------解决方案--------------------
serialize()
序列化.
使用的时候还原一下
unserialize()
------解决方案--------------------
$ar = array(array('sh',20,'男'),array('se',30,'女'));
foreach($ar as $v) {
mysql_query("insert into 表 (name, age, sex) values ('$v[0]', $v[1], '$v[2]')");
}

在mysql中,可以利用char()和REPLACE()函数来替换换行符;REPLACE()函数可以用新字符串替换列中的换行符,而换行符可使用“char(13)”来表示,语法为“replace(字段名,char(13),'新字符串') ”。

转换方法:1、利用cast函数,语法“select * from 表名 order by cast(字段名 as SIGNED)”;2、利用“select * from 表名 order by CONVERT(字段名,SIGNED)”语句。

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了关于MySQL复制技术的相关问题,包括了异步复制、半同步复制等等内容,下面一起来看一下,希望对大家有帮助。

标题:C#中使用Array.Sort函数对数组进行排序的示例正文:在C#中,数组是一种常用的数据结构,经常需要对数组进行排序操作。C#提供了Array类,其中有Sort方法可以方便地对数组进行排序。本文将演示如何使用C#中的Array.Sort函数对数组进行排序,并提供具体的代码示例。首先,我们需要了解一下Array.Sort函数的基本用法。Array.So

在mysql中,可以利用REGEXP运算符判断数据是否是数字类型,语法为“String REGEXP '[^0-9.]'”;该运算符是正则表达式的缩写,若数据字符中含有数字时,返回的结果是true,反之返回的结果是false。

在mysql中,是否需要commit取决于存储引擎:1、若是不支持事务的存储引擎,如myisam,则不需要使用commit;2、若是支持事务的存储引擎,如innodb,则需要知道事务是否自动提交,因此需要使用commit。

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了mysql高级篇的一些问题,包括了索引是什么、索引底层实现等等问题,下面一起来看一下,希望对大家有帮助。

“mysql-connector”是mysql官方提供的驱动器,可以用于连接使用mysql;可利用“pip install mysql-connector”命令进行安装,利用“import mysql.connector”测试是否安装成功。


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