Quick Search:
CODE
Oracle PL/SQL Code Library
JOBS
Find Or Post Oracle Jobs
FORUM
Oracle Discussion & Chat
 mySQL: Check for duplicates and delete duplicates from database. Jump to:  
Category: >> mySQL >> Check for duplicates and delete duplicates from database. Bookmark and Share

<< lastnext >>

Snippet Name: Check for duplicates and delete duplicates from database.

Description: Before a user submits data to mysql, check for and remove duplicate entries before the data is entered into the database.

Comment: (none)

Language: PHP, MYSQL
Highlight Mode: PLSQL
Last Modified: March 16th, 2009

$check = mysql_query("SELECT * FROM `table` WHERE `field` = '$value'");
 
IF (mysql_num_rows($check) > 0){
     // Duplicate EXISTS. Remove it
     mysql_query("DELETE FROM `table` WHERE `field` = '$value' LIMIT 1");
}
 
// INSERT NEW data
mysql_query("INSERT INTO `table` (`field1`) VALUES ('$value1')");  


Free
Oracle Magazine
Subscriptions
and Oracle White Papers


SQL University.net courses meet the most demanding needs of the business world for advanced education in a cost-effective manner. SQL University.net courses are available immediately for IT professionals and can be taken without disruption of your workplace schedule or processes.

Compared to traditional travel-based training, SQL University.net saves time and valuable corporate resources, allowing companies to do more with less. That's our mission, and that's what we deliver.

Click here to find out more
 
Home      :      Code Library      :      Sponsors      :      Privacy      :      Terms of Use      :      Contact Us 89 users online    © 2009 psoug.org

PSOUG LOGIN
Username: 
Password: 
Forgot your password?