PHP 手冊
前一頁 |  | 下一頁

# maxdb_affected_rows

(no version information, might be only in CVS)

maxdb_affected_rows -- Gets the number of affected rows in a previous MaxDB operation

## Description

Procedural style:

mixed maxdb_affected_rows ( resource link )

maxdb_affected_rows() returns the number of rows affected by the last INSERT, UPDATE, or DELETE query associated with the provided link parameter. If this number cannot be determined, this function will return -1.

> 注: For SELECT statements maxdb_affected_rows() works like maxdb_num_rows().

The maxdb_affected_rows() function only works with queries which modify a table. In order to return the number of rows from a SELECT query, use the maxdb_num_rows() function instead.

## Return Values

An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records where updated for an UPDATE statement, no rows matched the WHERE clause in the query or that no query has yet been executed. -1 indicates that the number of rows affected can not be determined.

## See also

maxdb_num_rows(), maxdb_info().

## Example

範例 1. Procedural style

`<?php
$link = maxdb_connect("localhost", "MONA", "RED");
if (!$link) {
printf("Can't connect to localhost. Error: %s\n", maxdb_connect_error());
exit();
}
maxdb_report (MAXDB_REPORT_OFF);
maxdb_query($link,"DROP TABLE mycustomer");
maxdb_report (MAXDB_REPORT_ERROR);
/* Insert rows */
maxdb_query($link, "CREATE TABLE mycustomer AS SELECT * from hotel.customer");
printf("Affected rows (INSERT): %d\n", maxdb_affected_rows($link));
maxdb_query($link, "ALTER TABLE mycustomer ADD Status int default 0");
/* update rows */
maxdb_query($link, "UPDATE mycustomer SET Status=1 WHERE cno > 50");
printf("Affected rows (UPDATE): %d\n", maxdb_affected_rows($link));
/* delete rows */
maxdb_query($link, "DELETE FROM mycustomer WHERE cno < 50");
printf("Affected rows (DELETE): %d\n", maxdb_affected_rows($link));
/* select all rows */
$result = maxdb_query($link, "SELECT title FROM mycustomer");
printf("Affected rows (SELECT): %d\n", maxdb_affected_rows($link));
maxdb_free_result($result);
/* Delete table Language */
maxdb_query($link, "DROP TABLE mycustomer");
/* close connection */
maxdb_close($link);
?>`

The above examples would produce the following output:

    Affected rows (INSERT): 15
    Affected rows (UPDATE): 15
    Affected rows (DELETE): 0
    Affected rows (SELECT): -1

前一頁 | 內容 | 下一頁
MaxDB PHP Extension | 上一層 | maxdb_autocommit