AWS中的DBA（数据库管理员）角色权限可以通过多种方式进行授予，下面是一种解决方法的示例：

1. 创建一个新的IAM（Identity and Access Management）策略，命名为"DBA_Permissions"，并在该策略中定义DBA角色需要的权限。以下是一个示例策略：

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "rds:CreateDBInstance",
        "rds:DeleteDBInstance",
        "rds:ModifyDBInstance",
        "rds:DescribeDBInstances",
        "rds:CreateDBSnapshot",
        "rds:DeleteDBSnapshot",
        "rds:RestoreDBInstanceFromDBSnapshot",
        "rds:DescribeDBSnapshots",
        "rds:DescribeDBClusterSnapshots",
        "rds:CreateDBCluster",
        "rds:DeleteDBCluster",
        "rds:ModifyDBCluster",
        "rds:DescribeDBClusters",
        "rds:CreateDBClusterSnapshot",
        "rds:DeleteDBClusterSnapshot",
        "rds:RestoreDBClusterFromSnapshot",
        "rds:DescribeDBClusterSnapshots",
        "rds:DescribeDBClusterEndpoints",
        "rds:CreateDBParameterGroup",
        "rds:DeleteDBParameterGroup",
        "rds:ModifyDBParameterGroup",
        "rds:DescribeDBParameterGroups",
        "rds:ModifyDBSubnetGroup",
        "rds:CreateDBSubnetGroup",
        "rds:DeleteDBSubnetGroup",
        "rds:DescribeDBSubnetGroups",
        "rds:CreateEventSubscription",
        "rds:DeleteEventSubscription",
        "rds:ModifyEventSubscription",
        "rds:DescribeEventSubscriptions",
        "rds:AddTagsToResource",
        "rds:RemoveTagsFromResource",
        "rds:ListTagsForResource",
        "rds:ListTagsForResource",
        "rds:DescribeEvents"
      ],
      "Resource": "*"
    }
  ]
}

2. 为DBA用户或角色附加上述策略。可以通过AWS管理控制台、AWS CLI或AWS SDK进行操作。以下是一个使用AWS CLI的示例命令：

aws iam attach-user-policy --user-name DBAUser --policy-arn arn:aws:iam::123456789012:policy/DBA_Permissions

请注意，上述命令中的123456789012应替换为您的AWS账户ID。

通过执行上述步骤，DBA用户或角色将获得管理AWS RDS（关系型数据库服务）的权限，包括创建、删除、修改和描述数据库实例、数据库快照、数据库集群等的权限。此外，还包括管理数据库参数组、子网组、事件订阅、资源标签等的权限。