java.sql.SQLException: Subquery returns more than 1 row
时间: 2023-10-12 07:05:14 浏览: 38
java.sql.SQLException: Subquery returns more than 1 row错误表示子查询返回了多条数据。这个错误通常发生在子查询中期望返回单个值,但实际上返回了多个值的情况下。解决这个问题的方法有几种。一种方法是通过在子查询中添加限制条件,确保只返回单个值。例如,可以使用限制关键字如IN、SOME、ANY、ALL来限制子查询结果。另一种方法是在写入数据时添加逻辑判断或使用外键来防止重复写入数据。如果是在客户端访问时出现这个错误,可能是由于MySQL服务器的设置问题。可以尝试登录到服务器并检查相关设置,如允许访问的主机IP地址等。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [java.sql.SQLException: Subquery returns more than 1 row](https://blog.csdn.net/libusi001/article/details/112544739)[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^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* [java.sql.SQLException: null, message from server: “Host ‘%’ is not allowed to connect to](https://download.csdn.net/download/weixin_38720653/13687787)[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^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]