DDL (Data Definition Language) statements allow you to alter the data structure of MySQL database components. These statements allow the database user to maintain the records according to some particular requirements. While executing DDL statements is an easy task, the problem arises when MySQL database table indexes gets corrupted or damaged. In such situations, you receive an error message that does not
allow you to perform any DDL operation on the MySQL database components. For complete access of records after such scenarios, you will need to restore MySQL database from an updated backup. But if in case,
no backup is available or backup falls short to restore the required data, then you will need to use advanced mysql database repair
software to comprehensively repair the corrupted database. As a practical instance, when you attempt to insert some records saved in one table to another table, you encounter the below error message: "ERROR 1062: Duplicate ... key"
The above error message prevents the insertion of records from occurring.
Cause
The root cause for the occurrence of the above error message is corruption of table indexes. Corruption in MySQL table indexes can occur due to various reasons like MySQLD head crash, hardware crash, improper
use of MySQL utilities, operating system corruption, virus attacks, and many more similar reasons.
Resolution
To resolve the above error message, you will need to disable the indexes. In most cases, disabling the table indexes resolves the issue and allows you to access your database. However, if the problem persists, then
you will need to use the below repair command:
myisamchk -r -q table_name
But if in case, the above command also fails to perform, then you will need to use a powerful MySQL Database Recovery tool. MySQL Recovery utilities provide safe, complete, and risk-free database repair by
maintaining the intactness of data. These tools use advanced scanning procedures to comprehensively repair the corrupted MySQL databases. With easy understandability, the tools can be used by both technical and
non-technical users.
Stellar Phoenix Database Recovery For MySQL is a professional mysql database recovery software that repairs corrupt MySQL
database (created in both MySQL database storage engines - MyISAM and InnoDB) after almost all corruption scenarios. Supported by Windows Vista, XP, 2003 and 2000, the software safely recovers almost all
MySQL objects like tables, primary key(s), and relations. Compatible with MySQL 5.x, the repair tool provides Windows based recovery from MySQL database installed on Linux platform.

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