Mysql Error 1062 Duplicate Entry For Key 1 Myisam
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#1062 - Duplicate Entry For Key
Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million mysql duplicate entry for key primary programmers, just like you, helping each other. Join them; it only takes a minute: Sign up #1062 - Duplicate entry '' for key 'unique_id' When Trying to add UNIQUE KEY (MySQL) up vote 10 down vote
Mysql Duplicate Entry For Key 2
favorite 2 I've got an error on MySQL while trying to add a UNIQUE KEY. Here's what I'm trying to do. I've got a column called 'unique_id' which is VARCHAR(100). There are no indexes defined on the table. I'm getting this error: #1062 - Duplicate entry '' for key 'unique_id' When I try to add a UNIQUE key. Here is a screenshot of how I'm setting it up in phpMyAdmin: Here is the mysql duplicate entry error MySQL query that's generate by phpMyAdmin: ALTER TABLE `wind_archive` ADD `unique_id` VARCHAR( 100 ) NOT NULL FIRST , ADD UNIQUE ( `unique_id` ) I've had this problem in the past and never resolved it so I just rebuilt the table from scratch. Unfortunately in this case I cannot do that as there are many entries in the table already. Thanks for your help! mysql unique unique-key share|improve this question asked Jul 24 '13 at 0:35 MillerMedia 1,088104190 add a comment| 3 Answers 3 active oldest votes up vote 9 down vote accepted The error says it all: Duplicate entry '' So run the following query: SELECT unique_id,COUNT(unique_id) FROM yourtblname GROUP BY unique_id HAVING COUNT(unique_id) >1 This query will also show you the problem SELECT * FROM yourtblname WHERE unique_id='' This will show you where there are values that have duplicates. You are trying to create a unique index on a field with duplicates. You will need to resolve the duplicate data first then add the index. share|improve this answer answered Jul 24 '13 at 1:32 Namphibian 6,98722047 Oh ok, I get it now. Yeah that's actually the reason I'm creating the 'unique' value on the index. I didn't know exactly what the error meant (I was overthinking it). Thanks so much, that gets me pointed
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Mysql Error 1062 Duplicate Entry For Key Primary
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Mysql Duplicate Entry For Key 1-
company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags mysql create duplicate entry Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes http://stackoverflow.com/questions/17823322/1062-duplicate-entry-for-key-unique-id-when-trying-to-add-unique-key-my a minute: Sign up phpMyAdmin: MySQL Error 1062 - Duplicate entry up vote 3 down vote favorite 1 I connect with user "root" onto my database "test" which I host locally for development. Among others I have the table "ratingcomment". For some reason when I click on the table "ratingcomment" phpMyAdmin shows me the following error: Fehler SQL-Befehl: INSERT INTO `phpmyadmin`.`pma_history` http://stackoverflow.com/questions/4337781/phpmyadmin-mysql-error-1062-duplicate-entry ( `username` , `db` , `table` , `timevalue` , `sqlquery` ) VALUES ( 'root', 'test', 'ratingcomment', NOW( ) , 'SELECT * FROM `ratingcomment`' ) MySQL meldet: #1062 - Duplicate entry '838' for key 'PRIMARY' I used google to finde out the following "This indicates that you have a UNIQUE or PRIMARY index on a table, and there is a duplicate value someone on one of the values in one of these indexes." But I still dont quite understand the error! I use a primary Key, which auto-increments for all of my tables, so there actually shouldnt be a problem with the table. I had another table named "rating" which had a column "comment". Can it be, that this causes problems? mysql phpmyadmin corruption mysql-error-1062 duplicates share|improve this question edited Dec 2 '10 at 19:21 Riedsio 6,42711228 asked Dec 2 '10 at 17:16 Pascal Klein 5,5121562101 What is the primary for the table? Query record with primary key 838 and see compare the values to the values you are attempting to INSERT. –Jason McCreary Dec 2 '10 at 17:18 ad
name withheld ] Email Updates: Status: Can't repeat Impact on me: None Category:MySQL Server: https://bugs.mysql.com/bug.php?id=2027 MyISAM storage engine Severity:S1 (Critical) Version:4.1.1 (01 Dec 2003) OS:Linux https://dev.mysql.com/tech-resources/articles/mysql-enforcing-foreign-keys.html (GNU/Linux) Assigned to: Sergei Golubchik View Add Comment Files Developer Edit Submission View Progress Log Contributions [5 Dec 2003 13:27] [ name withheld ] Description: there is tmpidx table: create table tmpidx ( id bigint primary key auto_increment NOT NULL, host int, duplicate entry dir bool, path text, clear_path text, size int, idxDate DATETIME, FULLTEXT(clear_path), INDEX index_host (host), INDEX index_idxDate (idxDate) }; "cr" file attached. mysql> source cr [......] Query OK, 1 row affected (0.00 sec) Query OK, 1 row affected (0.00 sec) Query OK, 1 row affected (0.00 sec) Query OK, 1 row affected (0.01 duplicate entry for sec) ERROR 1062 (23000): Duplicate entry ' ' for key 4 mysql> How to repeat: [5 Dec 2003 13:39] Dean Ellis This looks to be a duplicate of #1721, however as a test case is presented here I will not mark it as such yet. What character set are you using? [5 Dec 2003 15:47] Sergei Golubchik I cannot repeat it, My setup: mysql> show variables like '%chara%'; +--------------------------+-----------------------------------------------+ | Variable_name | Value | +--------------------------+-----------------------------------------------+ | character_set_server | latin1 | | character_set_system | utf8 | | character_set_database | latin1 | | character_set_client | latin1 | | character_set_connection | latin1 | | character_set_results | latin1 | +--------------------------+-----------------------------------------------+ [5 Dec 2003 18:03] [ name withheld ] mysql> show variables like '%chara%'; +--------------------------+----------------------------------------+ | Variable_name | Value | +--------------------------+----------------------------------------+ | character_set_server | latin1 | | character_set_system | utf8 | | character_set_database | latin1 | | character_set_client | latin1 | | character_set_connection | latin1 | | character-sets-dir | /usr/local/mysql/s
Community MySQL.com Downloads Documentation Section Menu: Articles White Papers Case Studies Interviews About the Author Philippe Campos is a Senior Consultant of the EMEA Team at MySQL specialized in fine tuning and performance. He graduated in INPG (Grenoble) with a thesis in computer science, and has been involved in numerous databases designs, audit, support, production and migration (to Sybase mainly) over the past 20 years. He has been responsible for performance analysis and database tuning for large databases in application areas as well as data warehousing application. In 2006, he became a member of the EMEA team as Senior Consultant. Enforcing Foreign Keys Programmatically in MySQL Enforcing Foreign Keys Programmatically in MySQL In this article we explore how to program foreign keys into a MySQL Server. This is important when your application requires referential integrity and the storage engine you’d like to use, as in the case of MyISAM or NDB (Cluster), does not support this functionality natively. We should note that InnoDB and the upcoming code-named “Falcon” storage engine, both support foreign keys. Advantages of Foreign Keys In general, a foreign key is a field within a database record that points to a key (or group of fields forming a key) of another record in a different table. In this arrangement, a foreign key in one table will typically refer to the primary key of another table. This enables references which can be made to link information together. This type of design is a major component of what is known as “database normalization”. It should also be noted, that data, which serves as a foreign key in one record, cannot be removed if there is another record that assumes its existence. Some of the advantages of foreign key enforcement include: Assuming the proper design of the relationships, foreign key constraints make it more difficult for a pro