php mysql insert into while 意外终止
1 |
|
mysql_fetch_row($result)获取查询的结果,逐条处理,处理后写进一个新的表里面,但是每次执行while循环总是还没执行完程序就终止了,没有处理完数据,把insert into 换成printf(“**”);代替插入操作,会将程序正确执行完毕,而且每次运行程序插入的条数不一,有时多有时少,请问大侠们什么情况这是,苦恼啊..
回复讨论(解决方案)
PS:处理的数据是中文,有19万条数据,大约11M,服务器用的apache,是不是服务器负担重才终止的?
。。
像你这种问题,肯定是要在cli模式下跑单条sql处理才靠谱啊!!!
至不济也要先把数据导出,然后导入,而不是这样做啊
参见select into
我能说是分批/次处理
详解请看楼下说法……
#2楼说的写入文件再读取,我刚刚试过了,还是不行,insert 1K条后会同样不知原因地终止掉了。
看这处理能力(1000条左右)我如果要分批处理的话(#3楼说的方法)那要分多少次啊?我有20W条的记录啊。。
你就不会写成单条insert么
1k条insert当然会拖累mysql啊
单条insert插入多个数据会吧
用存储过程试试会不会好些
有几个问题需要注意排除:
1、php超时
2、web服务器超时
3、特殊字符未转义
4、count($array)
算法上可考虑:
每千条组装成多个VALUE的INSERT语句后插入
以分页方式逐段插入
直接使用SQL指令完成,而不经php转手
$sql = INSERT INTO upcn(uid,pid,cate1,cate2,cate3,cate4,cate5)
SELECT uid , pid
, substring_index(substring_index(cate,'$sepr',1),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',2),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',3),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',4),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',5),'$sepr',-1)
FROM upcm
SQL;
你就不会写成单条insert么
1k条insert当然会拖累mysql啊
单条insert插入多个数据会吧
insert ..values(),(),()... 是这样的吗?
用存储过程试试会不会好些
存储过程是什么意思?还没学习过。
有几个问题需要注意排除:
1、php超时
2、web服务器超时
3、特殊字符未转义
4、count($array)
算法上可考虑:
每千条组装成多个VALUE的INSERT语句后插入
以分页方式逐段插入
直接使用SQL指令完成,而不经php转手
$sql = INSERT INTO upcn(uid,pid,cate1,cate2,cate3,c……
这位是大神呐!太强了!这个方法很管用,9.15S就处理完了。
有几个问题需要注意排除:
1、php超时
2、web服务器超时
3、特殊字符未转义
4、count($array)
算法上可考虑:
每千条组装成多个VALUE的INSERT语句后插入
以分页方式逐段插入
直接使用SQL指令完成,而不经php转手
$sql = INSERT INTO upcn(uid,pid,cate1,cate2,cate3,cate4,cate5)
SELECT uid , pid
, substring_index(substring_index(cate,'$sepr',1),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',2),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',3),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',4),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',5),'$sepr',-1)
FROM upcm
SQL;
请问大神,这个直接使用SQL指令完成,而不经php转手是什么意思?
是不是利用PHP建立一个SQL文件,然后让sql执行?
我也遇到同样问题,还没解决...烦恼中...

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

In this article, we're going to explore the notification system in the Laravel web framework. The notification system in Laravel allows you to send notifications to users over different channels. Today, we'll discuss how you can send notifications ov

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

PHP logging is essential for monitoring and debugging web applications, as well as capturing critical events, errors, and runtime behavior. It provides valuable insights into system performance, helps identify issues, and supports faster troubleshoot
