The `oci_num_rows()` function is used to retrieve the number of rows affected or returned by a query executed with Oracle Database using the OCI8 extension. Here's an explanation of how `oci_num_rows()` works:
1. Syntax:
php
oci_num_rows($statement);
2. Parameters:
$statement: This parameter represents the Oracle statement handle returned by `oci_parse()` and executed using `oci_execute()`. It refers to the executed query or statement for which you want to get the number of rows.
3. Return Value:
The `oci_num_rows()` function returns the number of rows affected or returned by the executed query. It returns an integer value representing the count of rows.
4. Usage:
After executing a query with `oci_execute()`, you can use `oci_num_rows()` to determine the number of rows affected or returned by the query.
- It is commonly used in scenarios where you need to know the count of rows for result sets or the count of affected rows after an INSERT, UPDATE, or DELETE operation.
example that demonstrates the usage of `oci_num_rows()`:
php
$sql = "SELECT * FROM employees";
$statement = oci_parse($connection, $sql);
oci_execute($statement);
// Get the number of rows returned by the query
$numRows = oci_num_rows($statement);
echo "Number of rows: " . $numRows;
this example, we execute a SELECT query to fetch records from the "employees" table. After executing the query with `oci_execute()`, we use `oci_num_rows()` to retrieve the number of rows returned by the query and store it in the `$numRows` variable. Finally, we echo the count of rows.
oci_num_rows
(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)
oci_num_rows — Возвращает количество строк, изменённых в процессе выполнения запроса
Описание
Возвращает число строк, затронутых в процессе выполнения запроса.
Список параметров
-
statement -
Идентификатор допустимого OCI запроса.
Возвращаемые значения
Возвращает число затронутых строк в виде integer или false в случае возникновения ошибки
Примеры
Пример #1 Пример использования oci_num_rows()
<?php
$conn = oci_connect("hr", "hrpwd", "localhost/XE");
if (!$conn) {
$m = oci_error();
trigger_error(htmlentities($m['message']), E_USER_ERROR);
}
$stid = oci_parse($conn, "create table emp2 as select * from employees");
oci_execute($stid);
echo oci_num_rows($stid) . " строк вставлено.<br />\n";
oci_free_statement($stid);
$stid = oci_parse($conn, "delete from emp2");
oci_execute($stid, OCI_DEFAULT);
echo oci_num_rows($stid) . " строк удалено.<br />\n";
oci_commit($conn);
oci_free_statement($stid);
$stid = oci_parse($conn, "drop table emp2");
oci_execute($stid);
oci_free_statement($stid);
oci_close($conn);
?>Примечания
Замечание:
Функция не возвращает количество строк в результате выражения SELECT! Для запросов SELECT oci_num_rows() вернёт количество строк, которые были считаны в буфер с помощью функций oci_fetch*().
add a note
User Contributed Notes 2 notes
vihanga dot kule99 at gmail dot com ¶
1 year ago
pluueer at hotmail dot com ¶
14 years ago
If you want to return te number of rows without fetching all data it might by more efficient to use this code (correct me if I'm wrong):
$sql_query = 'SELECT COUNT(*) AS NUMBER_OF_ROWS FROM (' . $your_query . ')';
$stmt= oci_parse($conn, $sql_query);
oci_define_by_name($stmt, 'NUMBER_OF_ROWS', $number_of_rows);
oci_execute($stmt);
oci_fetch($stmt);
echo $number_of_rows;
