MYSQL在codeigniter中多次插入 [英] MYSQL multiple insert in codeigniter

问题描述

可能重复：

我知道有可能通过这样做在mySQL中进行多重插入：

  foreach （$ array as $ manuf）{
 $ sql [] ='（'.mysql_real_escape_string（$ manuf ['name']）。'，'。$ manuf ['lang']。 '。$ mId。'）'; 
} 
 
 $ this-> db-> query（'INSERT INTO manufacturer（name，lang，mid）VALUES'。implode（'，'，$ sql） 
  

我不知道有没有更好的方法来做这个，也许扩展当前的数据库

$ p

解决方案

您需要清楚地知道您希望在单个语句中插入多行的原因。是为了性能吗？

框架是用于编程的生产力和方便，但不一定是性能。我同意@Udi Mosayev给出的答案 - 在最简单的用法中使用框架API。

如果你插入少量行，

如果有大量的行，并且你真的需要他们以高性能插入，没有什么节拍 载入资料INFILE 。您尝试优化 INSERT 的使用方法是一分钱一分钱和愚蠢的。甚至将您的PHP数组转储到 tmpfile ，然后加载它 LOAD DATA 比使用 INSERT 更快。

Possible Duplicate:
insert multiple rows via a php array into mysql

I know about the possibility of making a multiple insert in mySQL by doing something like this:

    foreach ($array as $manuf) {    
        $sql[] = '("'.mysql_real_escape_string($manuf['name']).'", "'.$manuf['lang'].'", "'.$mId.'")';
    }

    $this->db->query('INSERT INTO manufacturers (name, lang ,mid) VALUES ' . implode(',', $sql) );

I wonder if there's a better way to do this and maybe extending the current DB (active-record) library to make it with even less code?

Thanks

解决方案

You need to be clear about your reason for wanting to insert multiple rows in a single statement. Is it for performance?

Frameworks are for programming productivity and convenience, but not necessarily performance. I agree with the answer given by @Udi Mosayev -- use the framework API in its simplest usage.

If you are inserting a small number of rows, the difference between inserting one row per statement and multiple rows per statement is insignificant.

If have a large number of rows and you really need them to insert with high-performance, nothing beats LOAD DATA INFILE. Your attempts to optimize usage of INSERT are being penny-wise and pound-foolish. Even dumping your PHP array into a tmpfile and then loading it LOAD DATA is faster than using INSERT.

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