sql foreach

SQL中的foreach主要用于在构建in条件中，它可以在SQL语句中迭代一个[集合](https://geek.csdn.net/educolumn/ba94496e6cfa8630df5d047358ad9719?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083)。foreach元素的属性包括item，index，[collection](https://geek.csdn.net/edu/8802d631b97a4a6af1f4d0bbf8527465?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083)，open，separator和close。其中item表示[集合](https://geek.csdn.net/educolumn/ba94496e6cfa8630df5d047358ad9719?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083)中每个元素迭代时的别名，index指定一个名称表示迭代的位置，open表示该语句的开始部分，separator表示每次迭代之间的分隔符，close表示结束部分。<em>1</em><em>2</em><em>3</em> #### 引用[.reference_title] - *1* [sql循环嵌套——需要用到foreach循环](https://blog.csdn.net/Whx123A/article/details/125877113)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chat[gpt](https://geek.csdn.net/educolumn/d2f82220638caf1d7a0d5521eb7b6775?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA5NTQ4NzEwLCJpYXQiOjE3MDg5NDM5MTAsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.Ycp4bmJnbuf-GXluSQA922QiehPy9qQiboAgoDqZFno&spm=1055.2569.3001.10083)_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}} ] [.reference_item] - *2* *3* [SQL使用foreach循环进行批量操作（[mybatis](https://geek.csdn.net/edu/47a0da7218b411332ba4349ff5e2a4c2?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA3MzcxOTM4LCJpYXQiOjE3MDY3NjcxMzgsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.RrTYEnMNYPC7AQdoij4SBb0kKEgHoyvF-bZOG2eGQvc&spm=1055.2569.3001.10083).xml中foreach的用法）](https://blog.csdn.net/weixin_46099269/article/de