SQL query how to update all duplicate filenames?

问题

I wanted to check data from documents table where there are duplicate filename or the same filename with the same employeeId and then update those filenames so that there will be no duplicates.

For example employeeId 216 has 2 or more documents with the same filenames which is DOC-15.. and DOC-15 , I wanted to rename the other file or add prefix to make it unique so that there will be no duplicates.

#Code

const documents = await sequelizeClient.query(
        `SELECT id, filename, COUNT(filename) FROM documents GROUP BY filename
      HAVING COUNT(filename) > 1;`,
        { type: QueryTypes.SELECT },
      );

      const promises = [];
      // eslint-disable-next-line no-plusplus
      for (let i = 0; i < documents.length; i++) {
        const prefix = Date.now().toString();
        const fileParts = documents[i].filename.split('.');
        const finalname = `${fileParts[0]}-${prefix}.${fileParts[1]}`;
        // eslint-disable-next-line no-await-in-loop
        promises.push(queryInterface.sequelize.query(`UPDATE ${EmployeeDocumentsModel.tableName} SET filename='${finalname}' WHERE employeeID=${documents[i].id};`));
      }
      await Promise.all(promises);

#Query on getting data with duplicate filenames

 SELECT id, filename, employeeId, COUNT(filename) FROM documents GROUP BY filename
      HAVING COUNT(filename) > 1;

#Data

来源：https://stackoverflow.com/questions/63068502/sql-query-how-to-update-all-duplicate-filenames