介绍一下 full join
时间: 2023-08-22 17:12:23 浏览: 98
引用\[2\]中提到了full join的描述和转换步骤。Full join是一种表连接操作,它返回两个表中的所有行,无论是否满足连接条件。在SQL中,full join可以通过使用UNION和LEFT JOIN、RIGHT JOIN来实现。在转换步骤中,可以使用NVL函数来处理NULL值,同时需要注意在使用full join时可能会遇到的问题。\[2\]
Full join在MySQL中是一种基础的关键词,通常在多表连接查询中使用。它的语法格式为:table_references: table_reference \[, table_reference\] ...\[3\]。
#### 引用[.reference_title]
- *1* *3* [mysql实现full join](https://blog.csdn.net/weixin_42522167/article/details/113157041)[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^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [full join 与 union](https://blog.csdn.net/qq_39657909/article/details/116483045)[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^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
阅读全文