powershell 遍历数据库表导出为csv

Write-Output 0
$server = ".\"
$database = "dbname"
$tablequery = "SELECT schemas.name as schemaName, tables.name as tableName from sys.tables inner join sys.schemas ON tables.schema_id = schemas.schema_id"
Write-Output 1
#Delcare Connection Variables
$connectionTemplate = "Data Source={0};Integrated Security=SSPI;Initial Catalog={1};"
$connectionString = [string]::Format($connectionTemplate, $server, $database)
$connection = New-Object System.Data.SqlClient.SqlConnection
$connection.ConnectionString = $connectionString
Write-Output 2
$command = New-Object System.Data.SqlClient.SqlCommand
$command.CommandText = $tablequery
$command.Connection = $connection
Write-Output 3
#Load up the Tables in a dataset
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $command
$DataSet = New-Object System.Data.DataSet
$SqlAdapter.Fill($DataSet)
$connection.Close()

# Loop through all tables and export a CSV of the Table Data
foreach ($Row in $DataSet.Tables[0].Rows)
{
    $queryData = "SELECT top 100 * FROM [$($Row[0])].[$($Row[1])]"

    #Specify the output location of your dump file
    $extractFile = "D:\T\Temp\gmstableexport\$($Row[0])_$($Row[1]).csv"

    $command.CommandText = $queryData
    $command.Connection = $connection

    $SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
    $SqlAdapter.SelectCommand = $command
    $DataSet = New-Object System.Data.DataSet
    $SqlAdapter.Fill($DataSet)
    $connection.Close()

    $DataSet.Tables[0]  | Export-Csv $extractFile -NoTypeInformation
}