多张表 left join

多张表的left join是指在查询中使用left join来连接多个表。left join返回左表中的所有记录，以及右表中与左表连接字段相等的记录。这种连接方式可以用来获取左表中的所有数据，无论是否有匹配的记录在右表中。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [使用left join实现多表联查](https://blog.csdn.net/m0_46864744/article/details/113771188)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *2* [多表联查--01---LEFT JOIN 实现多表联查](https://blog.csdn.net/weixin_48052161/article/details/116072167)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *3* [from 多张表 等于 left join 其他表.](https://download.csdn.net/download/lxxxzzz/3751522)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 33.333333333333336%"]
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