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# PDO::exec

(no version information, might be only in CVS)

PDO::exec -- Execute an SQL statement and return the number of affected rows

## Beschreibung

long PDO::exec ( string statement )

Warnung
Diese Funktion ist EXPERIMENTELL. Das Verhalten, der Funktionsname und alles Andere was hier dokumentiert ist, kann sich in zukünftigen PHP-Versionen ohne Ankündigung ändern. Seien Sie gewarnt und verwenden Sie diese Funktion auf eigenes Risiko.

PDO::exec() prepares and executes an SQL statement in a single function call, returning the number of rows affected by the statement.

PDO::exec() does not return results from a SELECT statement. For a SELECT statement that you only need to issue once during your program, consider issuing PDO::query(). For a SELECT statement that you need to issue multiple times, prepare a PDOStatement object with PDO::prepare() and issue the statement with PDOStatement::execute().

## Parameter Liste

statement

  The SQL statement to prepare and execute.

## Rückgabewerte

PDO::exec() returns the number of rows that were modified or deleted by the SQL statement you issued. If no rows were affected, PDO::exec() returns 0.

## Beispiele

Beispiel 1. Issuing a DELETE statement Count the number of rows deleted by a DELETE statement with no WHERE clause.
`<?php $dbh = new PDO('odbc:sample', 'db2inst1', 'ibmdb2'); /* Delete all rows from the FRUIT table */ $count = $dbh->exec("DELETE FROM fruit WHERE colour = 'red'"); /* Return number of rows that were deleted */ print("Return number of rows that were deleted:\n"); print("Deleted $count rows.\n"); ?>`
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
    Return number of rows that were deleted:
    Deleted 1 rows.

## Siehe auch

PDO::prepare()
PDO::query()
PDOStatement::execute()

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