#######################
<#
.SYNOPSIS
Writes data only to SQL Server tables.
.DESCRIPTION
Writes data only to SQL Server tables. However, the data source is not limited to SQL Server; any data source can be used, as long as the data can be loaded to a DataTable instance or read with a IDataReader instance.
.INPUTS
None
    You cannot pipe objects to Write-DataTable
.OUTPUTS
None
    Produces no output
.EXAMPLE
$dt = Invoke-Sqlcmd2 -ServerInstance "Z003\R2" -Database pubs "select *  from authors"
Write-DataTable -ServerInstance "Z003\R2" -Database pubscopy -TableName authors -Data $dt
This example loads a variable dt of type DataTable from query and write the datatable to another database
.NOTES
Write-DataTable uses the SqlBulkCopy class see links for additional information on this class.
Version History
v1.0   - Chad Miller - Initial release
v1.1   - Chad Miller - Fixed error message
.LINK
http://msdn.microsoft.com/en-us/library/30c3y597%28v=VS.90%29.aspx
#>
function Write-DataTable
{
    [CmdletBinding()]
    param(
    [Parameter(Position=0, Mandatory=$true)] [string]$ServerInstance,
    [Parameter(Position=1, Mandatory=$true)] [string]$Database,
    [Parameter(Position=2, Mandatory=$true)] [string]$TableName,
    [Parameter(Position=3, Mandatory=$true)] $Data,
    [Parameter(Position=4, Mandatory=$false)] [string]$Username,
    [Parameter(Position=5, Mandatory=$false)] [string]$Password,
    [Parameter(Position=6, Mandatory=$false)] [Int32]$BatchSize=50000,
    [Parameter(Position=7, Mandatory=$false)] [Int32]$QueryTimeout=0,
    [Parameter(Position=8, Mandatory=$false)] [Int32]$ConnectionTimeout=15
    )
    
    $conn=new-object System.Data.SqlClient.SQLConnection

    if ($Username)
    { $ConnectionString = "Server={0};Database={1};User ID={2};Password={3};Trusted_Connection=False;Connect Timeout={4}" -f $ServerInstance,$Database,$Username,$Password,$ConnectionTimeout }
    else
    { $ConnectionString = "Server={0};Database={1};Integrated Security=True;Connect Timeout={2}" -f $ServerInstance,$Database,$ConnectionTimeout }

    $conn.ConnectionString=$ConnectionString

    try
    {
        $conn.Open()
        $bulkCopy = new-object ("Data.SqlClient.SqlBulkCopy") $connectionString
        $bulkCopy.DestinationTableName = $tableName
        $bulkCopy.BatchSize = $BatchSize
        $bulkCopy.BulkCopyTimeout = $QueryTimeOut
        $bulkCopy.WriteToServer($Data)
        $conn.Close()
    }
    catch
    {
        $ex = $_.Exception
        Write-Error "$ex.Message"
        continue
    }

} #Write-DataTable