Copying file from AWS S3 to my SQL Server

  • SeattleDBA

    Ten Centuries

    Points: 1019

    We have a bucket in AWS S3 where backups from production are being copy to.

    My task is to copy the most recent backup file from AWS S3 to the local sandbox SQL Server, then do the restore.

    I have installed all of the AWS tools for windows on the local server. Credentials to connect to AWS S3 work, etc.

    My local server can list all of the files in the S3 bucket. I can successfully download a single file if I specifically name that file.

    Here is an example of that working pulling the most recent copy from July 25, 2016.

    aws s3 cp s3://mybucket/ E:\DBA

    My goal is to have a copy script that only pulls the most recent file, which I won't know the name of.

    Nothing I google or try is getting me the correct syntax to do this.

    Any help would be appreciated. Thanks.

  • RTaylor2208


    Points: 13188

    Using only the CLI this is pretty difficult to do, but using the AWS python SDK or powershell its much easier. Here is one way to do it in python:

    import boto

    import os

    from boto.s3.connection import S3Connection

    from boto.s3.key import Key

    #Load the keys into memory within the OS



    #Create local variable for the bucket

    s3bucket = "mybucket"

    #connect to the bucket

    conn = S3Connection()

    bucket = conn.lookup(s3bucket.lower())

    #get the contents of the bucket

    l = [(k.last_modified, k) for k in bucket]

    #sort the list

    key = sorted(l, cmp=lambda x,y: cmp(x[0], y[0]))[-1][1]

    #Download the latest modified file

    print 'Downloading %s' % (

    with open(, 'wb') as f:



    MCITP SQL 2005, MCSA SQL 2012

  • xsevensinzx

    One Orange Chip

    Points: 25558

    Yep, I would go with the python option. Saved as a script, can be executed by anything.

  • lsalih


    Points: 6143

    Even this post is real old, but I would like to add that I use powershell to copy files between AWS S3 and my local machine. Here is an example:

    $accessKey = 'keyinfo'
    $secretKey = 'secretekey'
    $region = 'us-east-1'
    $bucket = 'bucketname'
    $keyPrefix = '/foldernameinAWS/'
    $localPath = 'C:\SQLBackups\'

    $objects = Get-S3Object -BucketName $bucket -KeyPrefix $keyPrefix -AccessKey $accessKey -SecretKey $secretKey -Region $region | Sort-Object LastModified -descending | Select-Object -First 1 | select key

    foreach($object in $objects) {
        $localFileName = $object.Key -replace $keyPrefix, ''
        if ($localFileName -ne '') {
            $localFilePath = Join-Path $localPath $localFileName
            Copy-S3Object -BucketName $bucket -Key $object.Key -LocalFile $localFilePath -AccessKey $accessKey -SecretKey $secretKey -Region $region

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