如何使用POWERSHELL脚本获取此SQL输出

Import-Module SQLPS

$serverInstance = "服务器名称"
$database = "数据库名称"
$cred = Get-Credential
$connectionString = "Server=$serverInstance;Database=$database;Integrated Security=False;User Id=$cred.UserName;Password=$cred.GetNetworkCredential().Password;"
$connection = New-Object System.Data.SqlClient.SqlConnection($connectionString)
$connection.Open()

$query = "SELECT * FROM 表名"

$command = New-Object System.Data.SqlClient.SqlCommand($query, $connection)
$result = $command.ExecuteReader()

while ($result.Read()) {
    Write-Output ("列1: " + $result[0] + ", 列2: " + $result[1])
}

$connection.Close()