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$query = " select @@servername"
$csvFilePath = "c:\Scripts\queryresults.csv"
$instanceNameList = get-content c:\Scripts\serverlist.txt
$results=@()
foreach($instanceName in $instanceNameList)
{
write-host "Executing query against server: " $instanceName
$results += Invoke-Sqlcmd -Query $query -ServerInstance $instanceName
}
# Output to CSV
write-host "Saving Query Results in CSV format..."
$results | export-csv $csvFilePath -NoTypeInformation