This short Perl script provides a simple command line interface to Amazon SimpleDB. It requires you to also install the Perl modules provided by Amazon.

The latest version of this script can be found here:

http://simpledb-cli.notlong.com/

Here is the manpage extracted from the script including installation instructions:

NAME
    simpledb - Amazon SimpleDB command line interface

SYNOPSIS
     simpledb [opts] create-domain DOMAIN
     simpledb [opts] delete-domain DOMAIN
     simpledb [opts] list-domains

     simpledb [opts] put         DOMAIN ITEM [NAME=VALUE]...
     simpledb [opts] put-replace DOMAIN ITEM [NAME=VALUE]...
     simpledb [opts] get         DOMAIN ITEM [NAME]...
     simpledb [opts] delete      DOMAIN ITEM [NAME[=VALUE]]...

     simpledb [opts] select SELECTEXPRESSION

OPTIONS
     --help         Print help and exit.

     --aws-access-key-id KEY
                    AWS access key id
                    [Defaults to $AWS_ACCESS_KEY_ID environment variable]

     --aws-secret-access-key SECRETKEY
                    AWS secret access key
                    [Defaults to $AWS_SECRET_ACCESS_KEY environment variable]

     --max COUNT
                    Maximum number of domains/items to retrieve and list.
                    [Defaults to all]

     --separator STRING
                    Separator between attribute name and value.
                    [Defaults to equals (=)]

ARGUMENTS
     DOMAIN            Domain name
     ITEM              Item name
     NAME              Attribute name
     VALUE             Attribute value
     SELECTEXPRESSION  SimpleDB select expression

DESCRIPTION
    This utility provides a simple command line interface to most Amazon
    SimpleDB (SDB) actions.

EXAMPLES
    # The following examples assume you have set these environment
    variables:

      export AWS_ACCESS_KEY_ID=...
      export AWS_SECRET_ACCESS_KEY=...

    # Create a new SimpleDB domain:

      simpledb create-domain mydomain

    # List the domains for this account:

      simpledb list-domains

    # Create some items with attribute name=value pairs:

      simpledb put mydomain item1 key1=valueA key2=value2 x=why

      simpledb put mydomain item2 key1=valueB key2=value2 y=zee

    # Add another value for an attribute on an item:

      simpledb put mydomain item2 y=zed when=now who=you

    # Replace all values for specific attributes on an item:

      simpledb put-replace mydomain item1 key1=value1 newkey=newvalue

    # Delete all values for specific attributes on an item:

      simpledb delete mydomain item1 x

    # Delete specific values for specific attributes on an item:

      simpledb delete mydomain item2 who=you

    # List all item names in a domain

      simpledb select 'select itemName() from mydomain'

    # List all items and their attributes matching a given select query:

      simpledb select 'select * from mydomain where key2="value2"'

    # List all attributes on an item:

      simpledb get mydomain item1

      simpledb get mydomain item2

    # List specific attributes on an item:

      simpledb get mydomain item2 key2 y

    # Delete the entire SimpleDB domain including all items and attributes:

      simpledb delete-domain mydomain

ENVIRONMENT
     AWS_ACCESS_KEY_ID
                    Default AWS access key id

     AWS_SECRET_ACCESS_KEY
                    Default AWS secret access key

FILES
     $HOME/.awssecret
                    If the above fail, then the keys are sought here in the
                    format expected by the "aws" toolkit (one per line):
                            access_key_id
                            secret_access_key

     /etc/passwd-s3fs
                    If all of the above fail, then the keys are sought
                    here in the format expected by s3fs (colon separated):
                            access_key_id:secret_access_key

INSTALLATION
    BEWARE! The installation of dependencies is somewhat messy with this
    release and may require some understanding of how Perl works!

    This tool depends on the following Perl modules from CPAN:

      Getopt::Long
      Pod::Usage
      Digest::SHA1
      Digest::HMAC
      XML::Simple

    You can install them using the "cpan" command on many Linux distros:

      sudo cpan Getopt::Long Pod::Usage Digest::SHA1 Digest::HMAC XML::Simple

    This tool also depends on the Amazon::SDB modules provided by Amazon
    (not the one in CPAN). Amazon's modules can be found here:

      http://developer.amazonwebservices.com/connect/entry.jspa?externalID=1136

    Here is how I installed them.

      curl -Lo amazon-simpledb-perl-library.zip \
        http://amazon-simpledb-perl-library.notlong.com

      unzip amazon-simpledb-perl-library.zip

      sitelib=$(perl -MConfig -le 'print $Config{sitelib}')
      sudo scp -r amazon-simpledb-*-perl-library/src/Amazon $sitelib

    Finally, this command line interface can be installed with:

      sudo curl -Lo /usr/local/bin/simpledb http://simpledb-cli.notlong.com
      sudo chmod +x /usr/local/bin/simpledb

SEE ALSO
    Latest versions of this script available from the Google Code project:
    http://code.google.com/p/amazon-simpledb-cli/

    Amazon SimpleDB (SDB)
    http://www.amazon.com/SimpleDB-AWS-Service-Pricing/b/?node=342335011

    Amazon SimpleDB Developer Guide
    http://docs.amazonwebservices.com/AmazonSimpleDB/2007-11-07/DeveloperGui
    de/

    sdbShell (another SimpleDB command line interface by David Kavanagh)
    http://code.google.com/p/typica/

CAVEATS
    As currently written this tool does not support keys containing equal
    signs (=).

    Output will be difficult to parse if the values contain newlines.

HISTORY
     2010-04-20 Eric Hammond <ehammond@thinksome.com>
     - Removed support for "query".  Please migrate to "select"

     2009-09-01 Peter Kaminski <kaminski@istori.com>
     - Added utf8 binmode for STDOUT
     - Added select method

     2009-03-16 Eric Hammond <ehammond@thinksome.com>
     - Fix --max options and large result sets without --max
       http://code.google.com/p/amazon-simpledb-cli/issues/detail?id=2

     2008-06-09 Eric Hammond <ehammond@thinksome.com>
     - Fallback to finding keys in $HOME/.awssecret or /etc/passwd-s3fs

     2008-06-03 Eric Hammond <ehammond@thinksome.com>
     - Completed --max option
     - bugfix: Corrected --aws-secret-access-key option spelling

     2008-05-26 Eric Hammond <ehammond@thinksome.com>
     - Original release