sqlsrv_num_rows

  • 项目

下载 PHP 驱动程序

报告结果集中的行数。

语法

  
sqlsrv_num_rows( resource $stmt )

参数

$stmt：要计算其行数的结果集。

返回值

如果在计算行数时出错，则返回false 。 否则，返回结果集中的行数。

注解

sqlsrv_num_rows 需要客户端、静态或键集游标，并且将返回 false（如果你使用向前游标或动态游标）。 （向前游标是默认值。）有关游标的详细信息，请参阅 sqlsrv_query 和游标类型（SQLSRV 驱动程序）。

示例

<?php  
   $server = "server_name";  
   $conn = sqlsrv_connect( $server, array( 'Database' => 'Northwind' ) );  
  
   $stmt = sqlsrv_query( $conn, "select * from orders where CustomerID = 'VINET'" , array(), array( "Scrollable" => SQLSRV_CURSOR_KEYSET ));  
  
   $row_count = sqlsrv_num_rows( $stmt );  
  
   if ($row_count === false)  
      echo "\nerror\n";  
   else if ($row_count >=0)  
      echo "\n$row_count\n";  
?>

以下示例显示，当有多个结果集（大容量查询）时，仅在你使用客户端游标时提供行数。

<?php  
$serverName = "(local)";  
$connectionInfo = array("Database"=>"AdventureWorks");  
$conn = sqlsrv_connect( $serverName, $connectionInfo);  
  
$tsql = "select * from HumanResources.Department";  
  
// Client-side cursor and batch statements  
$tsql = "select top 2 * from HumanResources.Employee;Select top 3 * from HumanResources.EmployeeAddress";  
  
// works  
$stmt = sqlsrv_query($conn, $tsql, array(), array("Scrollable"=>"buffered"));  
  
// fails  
// $stmt = sqlsrv_query($conn, $tsql);  
// $stmt = sqlsrv_query($conn, $tsql, array(), array("Scrollable"=>"forward"));  
// $stmt = sqlsrv_query($conn, $tsql, array(), array("Scrollable"=>"static"));  
// $stmt = sqlsrv_query($conn, $tsql, array(), array("Scrollable"=>"keyset"));  
// $stmt = sqlsrv_query($conn, $tsql, array(), array("Scrollable"=>"dynamic"));  
  
$row_count = sqlsrv_num_rows( $stmt );  
echo "\nRow count for first result set = $row_count\n";  
  
sqlsrv_next_result($stmt);  
  
$row_count = sqlsrv_num_rows( $stmt );  
echo "\nRow count for second result set = $row_count\n";  
?>

另请参阅

SQLSRV 驱动程序 API 参考