sqlsrv_num_rows

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sqlsrv_num_rows — Retrieves the number of rows in a result set

Description

sqlsrv_num_rows(resource $stmt): mixed

Retrieves the number of rows in a result set. This function requires that the statement resource be created with a static or keyset cursor. For more information, see sqlsrv_query(), sqlsrv_prepare(), or » Specifying a Cursor Type and Selecting Rows in the Microsoft SQLSRV documentation.

Parameters

stmt: The statement for which the row count is returned. The statement resource must be created with a static or keyset cursor. For more information, see sqlsrv_query(), sqlsrv_prepare(), or » Specifying a Cursor Type and Selecting Rows in the Microsoft SQLSRV documentation.

Return Values

Returns the number of rows retrieved on success and false if an error occurred. If a forward cursor (the default) or dynamic cursor is used, false is returned.

Examples

Example #1 sqlsrv_num_rows() example

<?php
$server = "serverName\sqlexpress";
$connectionInfo = array( "Database"=>"dbName", "UID"=>"username", "PWD"=>"password" );
$conn = sqlsrv_connect( $server, $connectionInfo );

$sql = "SELECT * FROM Table_1";
$params = array();
$options =  array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
$stmt = sqlsrv_query( $conn, $sql , $params, $options );

$row_count = sqlsrv_num_rows( $stmt );
   
if ($row_count === false)
   echo "Error in retrieveing row count.";
else
   echo $row_count;
?>

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User Contributed Notes 2 notes

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wazz3r at gmail dot com ¶

11 years ago

Try to avoid using this function if you need good performance. Specifying "Scrollable" in the options will make you queries take ages to run. If your result contains less than 5000 rows (might vary on different hardware) its faster to not use "Scrollable" and loop over them in php instead. 

If you need to check if a result contains rows use "sqlsrv_has_rows()", this function works without "Scrollable". After removing all my "Scrollable" queries, my page loadtime went from 900ms to 60ms.

To demonstrate, here is a query that returns 100 rows:
<?php
for($i = 0; $i < 100; $i++) {
    $q = "SELECT sku,name FROM product WHERE visible = 1";
    $result = sqlsrv_query($db,$q,array(), array( "Scrollable" => SQLSRV_CURSOR_KEYSET ));

    while($row = sqlsrv_fetch_array($result)) {}
}
?>
This takes about 10s! Thats 10 qps..

Now if we remove "Scrollable":
<?php
for($i = 0; $i < 100; $i++) {
    $q = "SELECT sku,name FROM product WHERE visible = 1";
    $result = sqlsrv_query($db,$q);

    while($row = sqlsrv_fetch_array($result)) {}
}
?>
This will run in 300ms, about 334 qps!