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MaxDB Funktionen
PHP Manual

# maxdb_query

# maxdb::query

(PECL maxdb >= 1.0)

maxdb_query -- maxdb::query — Performs a query on the database

### Beschreibung

Prozeduraler Stil

mixed maxdb_query ( resource `$link` , string `$query` [, int `$resultmode` ] )

Objektorientierter Stil

mixed maxdb::query ( string `$query` )

The maxdb_query() function is used to simplify the act of performing a query against the database represented by the `link` parameter.

### Rückgabewerte

Gibt bei Erfolg `TRUE` zurück. Im Fehlerfall wird `FALSE` zurückgegeben. For SELECT, SHOW, DESCRIBE or EXPLAIN maxdb_query() will return a result resource.

### Beispiele

Beispiel #1 Object oriented style

`<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/* Create table doesn't return a resultset */
if ($maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) {
printf("Table mycity successfully created.\n");
}
/* Select queries return a resultset */
if ($result = $maxdb->query("SELECT name FROM hotel.city")) {
printf("Select returned %d rows.\n", $result->num_rows);
/* free result set */
$result->close();
}
/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */
if ($result = $maxdb->query("SELECT * FROM hotel.city", MAXDB_USE_RESULT)) {
$result->close();
}
$maxdb->close();
?>`

Beispiel #2 Procedural style

`<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/* Create table doesn't return a resultset */
if (maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) {
printf("Table mycity successfully created.\n");
}
/* Select queries return a resultset */
if ($result = maxdb_query($link, "SELECT name FROM hotel.city")) {
printf("Select returned %d rows.\n", maxdb_num_rows($result));
/* free result set */
maxdb_free_result($result);
}
/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */
if ($result = maxdb_query($link, "SELECT * FROM hotel.city", MAXDB_USE_RESULT)) {
maxdb_free_result($result);
}
maxdb_close($link);
?>`

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    Table mycity successfully created.
    Select returned 25 rows.

### Siehe auch

- maxdb_real_query() - Execute an SQL query
- maxdb_multi_query() - Performs a query on the database
- maxdb_free_result() - Frees the memory associated with a result

maxdb_prepare
maxdb_real_connect
MaxDB Funktionen
PHP Manual