DynamoDB CLIから使うときに知りたくなるコマンド

環境

$ aws --version
aws-cli/1.16.155 Python/2.7.16 Darwin/19.0.0 botocore/1.12.145

テーブル一覧を表示

$ aws dynamodb list-tables
{
    "TableNames": [
        "Forum", 
        "Movies"
    ]
}

テーブル情報を知る

$ aws dynamodb describe-table --table-name Movies
{
    "Table": {
        "TableArn": "arn:aws:dynamodb:ap-northeast-1:470824059488:table/Movies", 
        "AttributeDefinitions": [
            {
                "AttributeName": "title", 
                "AttributeType": "S"
            }, 
            {
                "AttributeName": "year", 
                "AttributeType": "N"
            }
        ], 
        "ProvisionedThroughput": {
            "NumberOfDecreasesToday": 0, 
            "WriteCapacityUnits": 10, 
            "ReadCapacityUnits": 10
        }, 
        "TableSizeBytes": 0, 
        "TableName": "Movies", 
        "TableStatus": "ACTIVE", 
        "TableId": "f487b461-41df-41da-aaed-557a60291da8", 
        "KeySchema": [
            {
                "KeyType": "HASH", 
                "AttributeName": "year"
            }, 
            {
                "KeyType": "RANGE", 
                "AttributeName": "title"
            }
        ], 
        "ItemCount": 0, 
        "CreationDateTime": 1569596682.931
    }
}

データを挿入する

$ aws dynamodb put-item --table-name Movies --item '{"title":{"S":"Titanic"},"year":{"N":"1997"}}'
$ aws dynamodb put-item --table-name Movies --item '{"title":{"S":"The Godfather"},"year":{"N":"1972"}}'

テーブルの全てのデータを表示

$ aws dynamodb scan --table-name=Movies
{
    "Count": 2, 
    "Items": [
        {
            "year": {
                "N": "1997"
            }, 
            "title": {
                "S": "Titanic"
            }
        }, 
        {
            "year": {
                "N": "1972"
            }, 
            "title": {
                "S": "The Godfather"
            }
        }
    ], 
    "ScannedCount": 2, 
    "ConsumedCapacity": null
}

参考

aws cli で DynamoDB を使う - Qiita
DynamoDBをlocal環境で動かしてみる - Qiita