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# mysql_db_query

(PHP 3, PHP 4, PHP 5)

mysql_db_query -- Send a MySQL query

## Description

resource mysql_db_query ( string database, string query [, resource link_identifier] )

mysql_db_query() selects a database, and executes a query on it.

## Parameters

database

  The name of the database that will be selected.

query

  The MySQL query.

link_identifier

  The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() was called with no arguments. If by chance no connection is found or established, an `E_WARNING` level warning 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.

## ChangeLog

Version | Description
--- | ---
4.0.6 | This function is deprecated, do not use this function. Use mysql_select_db() and mysql_query() instead.

## Examples

Example 1. mysql_db_query() alternative example
`<?php if (!$link = mysql_connect('mysql_host', 'mysql_user', 'mysql_password')) { echo 'Could not connect to mysql'; exit; } if (!mysql_select_db('mysql_dbname', $link)) { echo 'Could not select database'; exit; } $sql = 'SELECT foo FROM bar WHERE id = 42'; $result = mysql_query($sql, $link); if (!$result) { echo "DB Error, could not query the database\n"; echo 'MySQL Error: ' . mysql_error(); exit; } while ($row = mysql_fetch_assoc($result)) { echo $row['foo']; } mysql_free_result($result); ?>`

## Notes

> Note: 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 mysql_select_db() instead of this function.

## See Also

mysql_query()
mysql_select_db()

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