Need MSSQL powershell Script

[System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.SMO') | Out-Null
[System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.SMO.SqlDataType') | Out-Null

# You can very easily convert this into a function / shell script by using parameters or $args[i] for these variables
$serverName = 'testserver';
$query = 'select * from [Sheet1$]';
$databaseName = "ExcelImport" ;
$tableName = "ExelSheet" ;
$filepath = "c:\workbook.xlsx";

# ACE works well for Excel 2007 or greater.  You need to use JET 4.0 for Excel 2003.  Use ACE whenever possible.
$connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=`"$filepath`";Extended Properties=`"Excel 12.0 Xml;HDR=YES`";"

# Instantiate some objects which will be needed
$serverSMO = New-Object Microsoft.SqlServer.Management.Smo.Server($serverName)
$db = $serverSMO.Databases[$databaseName];

$newTable = New-Object Microsoft.SqlServer.Management.Smo.Table ;
$newTable.Parent = $db ;
$newTable.Name = $tableName ;

$conn = New-Object System.Data.OleDb.OleDbConnection($connectionString)
$conn.open()

$cmd = New-Object System.Data.OleDb.OleDbCommand($query,$conn) 
$dataAdapter = New-Object System.Data.OleDb.OleDbDataAdapter($cmd) 
$dataTable = New-Object System.Data.DataTable 

$dataAdapter.fill($dataTable)
$conn.close()

# Drop the table if it exists
if($db.Tables.Contains($tableName).Equals($true))
{
	($db.Tables[$tableName]).Drop()
}

# Iterate the columns in the DataTable object and add dynamically named columns to the SqlServer Table object.	
foreach($col in $dataTable.Columns)
{
	$sqlDataType = [Microsoft.SqlServer.Management.Smo.SqlDataType]::Varchar
	$dataType = New-Object Microsoft.SqlServer.Management.Smo.DataType($sqlDataType);
	$dataType.MaximumLength = 8000;
	$newColumn = New-Object Microsoft.SqlServer.Management.Smo.Column($newTable,$col.ColumnName,$dataType);
	$newColumn.DataType = $dataType;
	$newTable.Columns.Add($newColumn);
}
$newTable.Create();

$connectionString = "Data Source=$serverName;Integrated Security=true;Initial Catalog=$databaseName;"
$bc = New-Object ("Data.SqlClient.SqlBulkCopy") $connectionString
$bc.DestinationTableName = "$tableName"
$bc.WriteToServer($dataTable)

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