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**Example 1: To add an item to a table**

The following ``put-item`` example adds a new item to the *MusicCollection* table. ::

    aws dynamodb put-item \
        --table-name MusicCollection \
        --item file://item.json \
        --return-consumed-capacity TOTAL \
        --return-item-collection-metrics SIZE

Contents of ``item.json``::

    {
        "Artist": {"S": "No One You Know"},
        "SongTitle": {"S": "Call Me Today"},
        "AlbumTitle": {"S": "Greatest Hits"}
    }

Output::

    {
        "ConsumedCapacity": {
            "TableName": "MusicCollection",
            "CapacityUnits": 1.0
        },
        "ItemCollectionMetrics": {
            "ItemCollectionKey": {
                "Artist": {
                    "S": "No One You Know"
                }
            },
            "SizeEstimateRangeGB": [
                0.0,
                1.0
            ]
        }
    }

For more information, see `Writing an Item <https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html#WorkingWithItems.WritingData>`__ in the *Amazon DynamoDB Developer Guide*.

**Example 2: To conditionally overwrite an item in a table**

The following ``put-item`` example overwrites an existing item in the ``MusicCollection`` table only if that existing item has an ``AlbumTitle`` attribute with a value of ``Greatest Hits``. The command returns the previous value of the item. ::

    aws dynamodb put-item \
        --table-name MusicCollection \
        --item file://item.json \
        --condition-expression "#A = :A" \
        --expression-attribute-names file://names.json \
        --expression-attribute-values file://values.json \
        --return-values ALL_OLD

Contents of ``item.json``::

    {
        "Artist": {"S": "No One You Know"},
        "SongTitle": {"S": "Call Me Today"},
        "AlbumTitle": {"S": "Somewhat Famous"}
    }

Contents of ``names.json``::

    {
        "#A": "AlbumTitle"
    }

Contents of ``values.json``::

    {
        ":A": {"S": "Greatest Hits"}
    }

Output::

    {
        "Attributes": {
            "AlbumTitle": {
                "S": "Greatest Hits"
            },
            "Artist": {
                "S": "No One You Know"
            },
            "SongTitle": {
                "S": "Call Me Today"
            }
        }
    }

If the key already exists, you should see the following output::

    A client error (ConditionalCheckFailedException) occurred when calling the PutItem operation: The conditional request failed.

For more information, see `Writing an Item <https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithItems.html#WorkingWithItems.WritingData>`__ in the *Amazon DynamoDB Developer Guide*.


Filemanager

Name Type Size Permission Actions
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batch-get-item.rst File 1.95 KB 0644
batch-write-item.rst File 2.92 KB 0644
create-backup.rst File 860 B 0755
create-global-table.rst File 1.03 KB 0755
create-table.rst File 22.02 KB 0644
delete-backup.rst File 1.85 KB 0755
delete-item.rst File 2.8 KB 0644
delete-table.rst File 789 B 0644
describe-backup.rst File 1.89 KB 0755
describe-continuous-backups.rst File 745 B 0755
describe-contributor-insights.rst File 1.14 KB 0644
describe-endpoints.rst File 542 B 0755
describe-global-table-settings.rst File 1.55 KB 0755
describe-global-table.rst File 952 B 0755
describe-limits.rst File 576 B 0755
describe-table-replica-auto-scaling.rst File 4.11 KB 0755
describe-table.rst File 1.41 KB 0644
describe-time-to-live.rst File 551 B 0755
get-item.rst File 3.17 KB 0644
list-backups.rst File 7.38 KB 0644
list-contributor-insights.rst File 3.33 KB 0644
list-global-tables.rst File 739 B 0755
list-tables.rst File 2.79 KB 0644
list-tags-of-resource.rst File 2.34 KB 0644
put-item.rst File 2.68 KB 0644
query.rst File 6.88 KB 0644
restore-table-from-backup.rst File 2.17 KB 0755
restore-table-to-point-in-time.rst File 2.05 KB 0755
scan.rst File 1.48 KB 0644
tag-resource.rst File 510 B 0755
transact-get-items.rst File 2.02 KB 0644
transact-write-items.rst File 3.98 KB 0644
untag-resource.rst File 521 B 0755
update-continuous-backups.rst File 908 B 0755
update-contributor-insights.rst File 780 B 0644
update-global-table-settings.rst File 2.15 KB 0755
update-global-table.rst File 1.06 KB 0755
update-item.rst File 3.39 KB 0644
update-table-replica-auto-scaling.rst File 6.29 KB 0755
update-table.rst File 14.27 KB 0644
update-time-to-live.rst File 585 B 0755