PHP: db2_num_rows - Manual

downloads | documentation | faq | getting help | mailing lists | reporting bugs | php.net sites | links | conferences | my php.net

search for in the

db2_pconnect db2_num_fields

Last updated: Fri, 26 Jan 2007

view this page in

# db2_num_rows

(PECL)

db2_num_rows -- Returns the number of rows affected by an SQL statement

## Описание

int db2_num_rows ( resource stmt )

Returns the number of rows deleted, inserted, or updated by an SQL statement.

To determine the number of rows that will be returned by a SELECT statement, issue SELECT COUNT(*) with the same predicates as your intended SELECT statement and retrieve the value.

If your application logic checks the number of rows returned by a SELECT statement and branches if the number of rows is 0, consider modifying your application to attempt to return the first row with one of db2_fetch_assoc(), db2_fetch_both(), db2_fetch_array(), or db2_fetch_row(), and branch if the fetch function returns `FALSE`.

> Замечание: If you issue a SELECT statement using a scrollable cursor, db2_num_rows() returns the number of rows returned by the SELECT statement. However, the overhead associated with scrollable cursors significantly degrades the performance of your application, so if this is the only reason you are considering using scrollable cursors, you should use a forward-only cursor and either call SELECT COUNT(*) or rely on the boolean return value of the fetch functions to achieve the equivalent functionality with much better performance.

## Список параметров

`stmt`

  A valid `stmt` resource containing a result set.

## Возвращаемые значения

Returns the number of rows affected by the last SQL statement issued by the specified statement handle.

add a note User Contributed Notes
db2_num_rows
There are no user contributed notes for this page.
db2_pconnect db2_num_fields

Last updated: Fri, 26 Jan 2007
show source | credits | stats | sitemap | contact | advertising | mirror sites
Copyright © 2001-2007 The PHP Group
All rights reserved.
This mirror generously provided by: Yahoo! Inc.
Last updated: Sat Mar 10 09:32:46 2007 PST