如何在SQL Server中使用PDO获得最后插入的行的ID? [英] How can I get the ID of the last INSERTed row using PDO with SQL Server?

问题描述

在其他情况下，我可能会想使用

Under other circumstances I might be tempted to use

$result = mssql_query("INSERT INTO table (fields) VALUES (data); 
                       SELECT CAST(scope_identity() AS int)");

但是当我将插入用户提交的数据时，我想继续使用PDO，它将返回一个空数组.

but as I will be inserting user-submitted data, I want to continue to use PDO, which returns an empty array.

不幸的是，我正在Linux服务器上运行PHP，并使用dblib与不支持PDO::lastInsertID()的Microsoft SQL Server进行接口.

Unfortunately, I'm running PHP on a Linux server and using dblib to interface with Microsoft SQL Server, which doesn't support PDO::lastInsertID().

请帮助！

更新为包含代码示例

这是我正在使用的代码:col1是类型int identity的字段，而col2是默认值为getdate()的datetime.

Here's the code I'm using: col1 is a field of type int identity and col2 is a datetime with a default of getdate().

//  Connect to db with PDO
$pdo = new PDO( 'dblib:host=' . $host . ';dbname=' . $database . ';', $username, $password, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION) );
//  Connect to db with MSSQL
$sql = mssql_connect( $host, $username, $password );
mssql_select_db( $database, $sql );
//  Create SQL statement
$query = "INSERT INTO [table] ( col3, col4, col5 )
          VALUES ( 'str1', 'str2', 'str3' );
          SELECT SCOPE_IDENTITY() AS theID;";
//  Run with MSSQL
echo "Using MSSQL...\n";
$result = mssql_query( $query );
$the_id = mssql_result( $result, 0, 'theID' );
echo "Query OK. Returned ID is " . $the_id . "\n";
// Run with PDO
echo "\nUsing PDO...\n";
$stmt = $pdo->query( $query );
$result = $stmt->fetchAll( PDO::FETCH_ASSOC );
print_r( $result );

这是显示的内容:

Using MSSQL...
Query OK. Returned ID is 149

Using PDO...
Array
(
)

我很想知道自己做了一些愚蠢的事情，而不是遇到可怕的死胡同:)

I would love to find out that I'd done something stupid, rather than come up against a horrible dead end :)

推荐答案

您有几种选择:

SELECT @@IDENTITY - return the last ID created by actions of the current connection, regardless of table/scope

SELECT SCOPE_IDENTITY() - last ID produced by the current connection, in scope, regardless of table

SELECT IDENT_CURRENT('name_of_table'); - last ID produced on that table, regardless of table/scope/connection

在这三者中，SCOPE_IDENTITY()是最佳候选人.

Of the three, SCOPE_IDENTITY() is the best candidate.

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