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# maxdb_select_db

(no version information, might be only in CVS)

maxdb_select_db

(no version information, might be only in CVS)

maxdb->select_db -- Selects the default database for database queries

## Description

bool maxdb_select_db ( resource link, string dbname )

The maxdb_select_db() function selects the default database (specified by the dbname parameter) to be used when performing queries against the database connection represented by the link parameter.

> Anmerkung: This function should only be used to change the default database for the connection. You can select the default database with 4th parameter in maxdb_connect().

## Return values

Gibt bei Erfolg `TRUE` zurück, im Fehlerfall `FALSE`.

## See also

maxdb_connect() maxdb_real_connect()

## Example

Beispiel 1. Object oriented style
`<?php $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); } /* return name of current default database */ if ($result = $maxdb->query("SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) { $row = $result->fetch_row(); printf("Default database is %s.\n", $row[0]); $result->close(); } /* change db to world db */ $maxdb->select_db("XXXXXXXX"); /* return name of current default database */ if ($result = $maxdb->query("SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) { $row = $result->fetch_row(); printf("Default database is %s.\n", $row[0]); $result->close(); } $maxdb->close(); ?>`

Beispiel 2. Procedural style
`<?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); } /* return name of current default database */ if ($result = maxdb_query($link, "SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) { $row = maxdb_fetch_row($result); printf("Default database is %s.\n", $row[0]); maxdb_free_result($result); } /* change db to world db */ maxdb_select_db($link, "XXXXXXXX"); /* return name of current default database */ if ($result = maxdb_query($link, "SELECT SERVERDB FROM USERS WHERE USERNAME='MONA'")) { $row = maxdb_fetch_row($result); printf("Default database is %s.\n", $row[0]); maxdb_free_result($result); } maxdb_close($link); ?>`

The above examples would produce the following output:

    Default database is <...>.

    Warning: maxdb_select_db(): -10709 Connection failed (RTE:database not running) <...>

    Warning: maxdb_query(): -10821 Session not connected [] <...>

    Warning: maxdb_close(): -10821 Session not connected [] <...>

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