ERROR 1068 (42000): Multiple primary key defined
时间: 2024-06-01 07:11:44 浏览: 9
This error message is related to a database management system such as MySQL or PostgreSQL. It means that there are multiple columns or fields defined as primary keys for a table. In a database table, a primary key is a unique identifier for each row that helps to avoid duplicate data and ensure that each record can be accessed efficiently.
To resolve this error, you need to check the table's schema and remove the duplicate primary keys. You can do this by altering the table and removing one of the primary key constraints. For example, if you have two columns (id and name) defined as primary keys, you can remove one of them by running the following SQL command:
ALTER TABLE table_name DROP PRIMARY KEY;
Replace "table_name" with the name of your table, and specify the name of the primary key constraint that you want to drop. Once you have removed the duplicate primary key, you should be able to modify the table schema without encountering the error.
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