How do I fix duplicate key in MySQL for primary key?

How do I fix duplicate key in MySQL for primary key?

How to fix: MySQL Duplicate entry for key PRIMARY on…

1. Create a backup of the database by issuing: mysqldump -uUSER -pPASSWORD DBNAME > /tmp/my_backup. sql.
2. Drop and recreate the database. drop database DBNAME; create database DBNAME;
3. Reload the import. mysql -uUSER -pPASSWORD DBNAME < /tmp/my_backup. sql.

What does duplicate entry mean?

Definition of duplicate (Entry 3 of 3) 1a : either of two things exactly alike and usually produced at the same time or by the same process. b : an additional copy of something (such as a book or stamp) already in a collection.

How do you handle duplicate key exceptions in SQL?

1. Hello,
2. Handle the Exception appropriately (log messages in your case) and continue inserting non-duplicate records to the table.
3. The *best* way would be to check whether the record exists.
4. But if they are always supposed to be inserts then you should fix your key management.

Why is MySQL error 1062 showing duplicate entry?

As looking on your error #1062 – Duplicate entry ‘2-S. Name’ for key ‘PRIMARY’ it is saying that you use primary key in your number field that’s why it is showing duplicate Error on Number Field. So Remove this primary Key then it inset duplicate also. Share.

Why do I get a duplicate entry error in SQL?

The Duplicate Entry error appears because of multiple reasons depending like if you are working with SQL possible the error comes because of the duplicate key, unique data field, or data type -upper limit. Also if the table indexes are corrupted then also the error seems to appear.

How to get rid of duplicate entry error?

STEP 1. Firstly backup your database using the below command STEP 2. Once the backup is done, drop the database STEP 3. Now recreate the database, by using the below command STEP 4. Now that you have created the database import using the below command STEP 5. Now check if the duplicate entry ‘1’ for key ‘primary’ error still occurs 5.

When does a duplicate entry occur in a primary key?

The Value Already Exist (Duplicate Value) Now the #1062 – duplicate entry ‘1’ for key ‘primary’ Error may occur when the data or value which you are trying to insert already exists in the Primary key. Furthermore, it is important to know that the Primary key does not accept duplicate entries.