MySQL select database query

Selects a database and executes a query on it
June 6, 2022 – 10:27 am
PHP MySQL Introduction - ppt download

Mysql_db_query — Selects a database and executes a query on it


resource mysql_db_query ( string $database , string $query [, resource $link_identifier = NULL ] )



The name of the database that will be selected.


The MySQL query.


The MySQL connection. If the link identifier is not specified, the last link opened by is assumed. If no such link is found, it will try to create one as if had been called with no arguments. If no connection is found or established, an E_WARNING level error is generated.

Return Values

Returns a positive MySQL result resource to the query result, or FALSE on error. The function also returns TRUE/FALSE for INSERT/UPDATE/DELETE queries to indicate success/failure.


Version Description
5.3.0 This function now throws an E_DEPRECATED notice.


Example #1 mysql_db_query alternative example



Be aware that this function does NOT switch back to the database you were connected before. In other words, you can't use this function to temporarily run a sql query on another database, you would have to manually switch back. Users are strongly encouraged to use the database.table syntax in their sql queries or instead of this function.

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