_mysql_connector.MySQLInterfaceError: Duplicate entry '1' for key 'PRIMARY'
时间: 2023-11-06 16:46:48 浏览: 45
This error is caused by attempting to add a record to a table in a MySQL database with a primary key value that already exists. The primary key is a unique identifier for each record in the table and cannot be duplicated.
To fix this error, you can either update the existing record with new information or choose a different primary key value for the new record. Alternatively, you may need to check if there are any other issues with the database schema or data integrity.
相关问题
Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '1' for key 'x_mu.PRIMARY'
引用\[1\]:返回到login页面时的url为http://localhost:8080/register?userName=%E8%B5%B5%E5%85%AD&identityCode=456795555225452&email=457698826%40qq.com&mobile=1550000&gender=0&loginName=six&password=,这时项目又将数据存储了一遍造成了数据重复。引用\[2\]:Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '1' for key 'x_mu.PRIMARY'
问题:为什么会出现"Duplicate entry '1' for key 'x_mu.PRIMARY'"的错误?
回答: 这个错误是由于数据库中的唯一键约束引起的。在给数据库插入数据时,如果插入的数据与已有数据的唯一键冲突,就会出现这个错误。在你提供的引用中,可以看到在返回到login页面时,项目又将数据存储了一遍,导致了数据的重复。而数据库中的唯一键约束要求每条记录的唯一键值都是唯一的,因此当插入重复的唯一键值时,就会出现"Duplicate entry '1' for key 'x_mu.PRIMARY'"的错误。这个错误提示中的'1'是指重复的唯一键值,'x_mu.PRIMARY'是指唯一键的名称。
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- *1* [Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry ‘‘six‘ for key ‘user_...](https://blog.csdn.net/m0_52163608/article/details/119719084)[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]
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com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '1' for key 'PRIMARY'
引用\[1\]和\[2\]中提到的异常信息是"com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '1-1' for key 'PRIMARY'"和"com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '9-2' for key 'PRIMARY'"。这个异常表示在数据库中出现了重复的主键值。主键是用来唯一标识数据库表中的每一行数据的字段。在这种情况下,主键值'1-1'和'9-2'已经存在于数据库中,因此无法再次插入相同的值。解决这个问题的方法是确保插入的主键值是唯一的,或者更新已存在的记录而不是插入新的记录。
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