# 用于对 DynamoDB 表进行读取、写入、更新和删除访问的 IAM 策略
<a name="iam-policy-example-data-crud"></a>

如果您需要允许应用程序创建、读取、更新和删除 Amazon DynamoDB 表、索引和流中的数据，请使用此策略。请根据情况替换 AWS 区域名称、账户 ID 以及表名称或通配符（\$1）。

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#### [ JSON ]

****  

```
{
    "Version":"2012-10-17",		 	 	 
    "Statement": [
        {
            "Sid": "DynamoDBIndexAndStreamAccess",
            "Effect": "Allow",
            "Action": [
                "dynamodb:GetShardIterator",
                "dynamodb:Scan",
                "dynamodb:Query",
                "dynamodb:DescribeStream",
                "dynamodb:GetRecords",
                "dynamodb:ListStreams"
            ],
            "Resource": [
                "arn:aws:dynamodb:us-west-2:123456789012:table/Books/index/*",
                "arn:aws:dynamodb:us-west-2:123456789012:table/Books/stream/*"
            ]
        },
        {
            "Sid": "DynamoDBTableAccess",
            "Effect": "Allow",
            "Action": [
                "dynamodb:BatchGetItem",
                "dynamodb:BatchWriteItem",
                "dynamodb:ConditionCheckItem",
                "dynamodb:PutItem",
                "dynamodb:DescribeTable",
                "dynamodb:DeleteItem",
                "dynamodb:GetItem",
                "dynamodb:Scan",
                "dynamodb:Query",
                "dynamodb:UpdateItem"
            ],
            "Resource": "arn:aws:dynamodb:us-west-2:123456789012:table/Books"
        },
        {
            "Sid": "DynamoDBDescribeLimitsAccess",
            "Effect": "Allow",
            "Action": "dynamodb:DescribeLimits",
            "Resource": [
                "arn:aws:dynamodb:us-west-2:123456789012:table/Books",
                "arn:aws:dynamodb:us-west-2:123456789012:table/Books/index/*"
            ]
        }
    ]
}
```

------

要扩展此策略以覆盖此帐户所有 AWS 区域的所有 DynamoDB 表，请使用通配符 (\$1) 作为区域和表名。例如：

```
"Resource":[
                "arn:aws:dynamodb:*:123456789012:table/*",
                "arn:aws:dynamodb:*:123456789012:table/*/index/*"
                ]
```