Title: Query Multiple Databases with HyperDB ?
Last modified: August 20, 2016

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# Query Multiple Databases with HyperDB ?

 *  [5pArxz](https://wordpress.org/support/users/5parxz/)
 * (@5parxz)
 * [13 years, 1 month ago](https://wordpress.org/support/topic/query-multiple-databases-with-hyperdb/)
 * Hi Guys,
 * Just wondering is it possible to query multiple databases for the same table 
   with HyperDB ?
 * My idea is running multiple WP sites with This and setting up a “Central” Server.
 * Now if a user tries to log it it must check if the user is on the “central” database
   but, it must also check if it’s on the site’s local database, and if it’s not
   i need to copy it over from the Central database to the local database, if that
   makes sense.
 * I managed to setup the master and slave now so users are running of a cetralized
   database, now i just need to find a way to get it copied to the local database
   and also check for user on local database ( Optional ). Any ideas or help would
   be greatly apreciated.
 * Kind Regards.
 * [http://wordpress.org/extend/plugins/hyperdb/](http://wordpress.org/extend/plugins/hyperdb/)

The topic ‘Query Multiple Databases with HyperDB ?’ is closed to new replies.

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## Tags

 * [custom queries](https://wordpress.org/support/topic-tag/custom-queries/)
 * [multisite](https://wordpress.org/support/topic-tag/multisite/)

 * 0 replies
 * 1 participant
 * Last reply from: [5pArxz](https://wordpress.org/support/users/5parxz/)
 * Last activity: [13 years, 1 month ago](https://wordpress.org/support/topic/query-multiple-databases-with-hyperdb/)
 * Status: not resolved