如何在没有密码的情况下从Powershell连接到sql server？

$serverInstance = "服务器实例名称"
$database = "数据库名称"
$connectionString = "Server=$serverInstance;Database=$database;Integrated Security=True;"
$connection = New-Object System.Data.SqlClient.SqlConnection($connectionString)
$connection.Open()

$query = "SELECT * FROM 表名"
$command = New-Object System.Data.SqlClient.SqlCommand($query, $connection)
$result = $command.ExecuteReader()
while ($result.Read()) {
    $result["列名"]
}

$connection.Close()