codeigniter - 数据库:如何使用单个更新查询更新多个表

codeigniter - database : how to update multiple tables with a single update query(codeigniter - 数据库:如何使用单个更新查询更新多个表)
本文介绍了codeigniter - 数据库:如何使用单个更新查询更新多个表的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在 codeigniter 论坛上看到了这个

I saw this on the codeigniter forum

考虑下面的代码

UPDATE a
INNER JOIN b USING (id)
SET a.firstname='Pekka', a.lastname='Kuronen',
b.companyname='Suomi Oy',b.companyaddress='Mannerheimtie 123, Helsinki Suomi'
WHERE a.id=1; 

这显然是你在 Codeigniter 中的做法

This is how you would apparently do it in Codeigniter

$this->db->set('a.firstname', 'Pekka');
$this->db->set('a.lastname', 'Kuronen');
$this->db->set('b.companyname', 'Suomi Oy');
$this->db->set('b.companyaddress', 'Mannerheimtie 123, Helsinki Suomi');
$this->db->where('a.id', 1);
$this->db->join('table2 as b', 'a.id = b.id');
$this->db->update('table as a');

这在现实中是行不通的.我看过它产生的 SQL,结果甚至没有提到连接.

this does not work in reality. I have had a look a the SQL which this produces and the results do not even mention the join.

有谁知道如何使用 Codeigniter 的 Active Record 数据库类通过连接进行更新?

推荐答案

我发现的一个解决方案是完全删除连接并将连接条件移动到 'where' 函数中,您还需要将更新字符串更改为包括新表.

One solution I have found is to remove the join altogether and move the join condition into a 'where' function, also you will need to change the update string to include the new table.

$this->db->set('a.firstname', 'Pekka');
$this->db->set('a.lastname', 'Kuronen');
$this->db->set('b.companyname', 'Suomi Oy');
$this->db->set('b.companyaddress', 'Mannerheimtie 123, Helsinki Suomi');

$this->db->where('a.id', 1);
$this->db->where('a.id = b.id');
$this->db->update('table as a, table2 as b');

这篇关于codeigniter - 数据库:如何使用单个更新查询更新多个表的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持编程学习网!

本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除!

相关文档推荐

Hibernate reactive No Vert.x context active in aws rds(AWS RDS中的休眠反应性非Vert.x上下文处于活动状态)
Bulk insert with mysql2 and NodeJs throws 500(使用mysql2和NodeJS的大容量插入抛出500)
Flask + PyMySQL giving error no attribute #39;settimeout#39;(FlASK+PyMySQL给出错误,没有属性#39;setTimeout#39;)
auto_increment column for a group of rows?(一组行的AUTO_INCREMENT列?)
Sort by ID DESC(按ID代码排序)
SQL/MySQL: split a quantity value into multiple rows by date(SQL/MySQL:按日期将数量值拆分为多行)