AWS数据库迁移服务（AWS Database Migration Service）是一种用于将数据库从一个源端迁移到AWS云端的服务。它支持多种不同的数据库引擎和架构，包括关系型数据库（如MySQL、Oracle和SQL Server）以及非关系型数据库（如MongoDB和DynamoDB）。

以下是使用AWS数据库迁移服务迁移不同数据库架构的代码示例：

1. 迁移关系型数据库（MySQL）到AWS RDS（关系型数据库服务）：

import boto3

client = boto3.client('dms')

response = client.create_endpoint(
    EndpointIdentifier='source-endpoint',
    EndpointType='source',
    EngineName='mysql',
    Username='source-username',
    Password='source-password',
    ServerName='source-server',
    Port=3306,
    DatabaseName='source-database'
)

response = client.create_endpoint(
    EndpointIdentifier='target-endpoint',
    EndpointType='target',
    EngineName='aurora',
    Username='target-username',
    Password='target-password',
    ServerName='target-server',
    Port=3306,
    DatabaseName='target-database'
)

response = client.create_replication_instance(
    ReplicationInstanceIdentifier='replication-instance',
    ReplicationInstanceClass='dms.r5.large',
    EngineVersion='3.3.1',
    AllocatedStorage=100,
    VpcSecurityGroupIds=['security-group-id'],
    AvailabilityZone='us-east-1a',
    PubliclyAccessible=False,
    MultiAZ=False
)

response = client.create_replication_task(
    ReplicationTaskIdentifier='replication-task',
    SourceEndpointArn='source-endpoint-arn',
    TargetEndpointArn='target-endpoint-arn',
    MigrationType='full-load',
    TableMappings='table-mappings.json'
)

response = client.start_replication_task(
    ReplicationTaskArn='replication-task-arn',
    StartReplicationTaskType='start-replication'
)

2. 迁移非关系型数据库（MongoDB）到AWS DocumentDB（MongoDB兼容的文档数据库）：

import boto3

client = boto3.client('dms')

response = client.create_endpoint(
    EndpointIdentifier='source-endpoint',
    EndpointType='source',
    EngineName='mongodb',
    Username='source-username',
    Password='source-password',
    ServerName='source-server',
    Port=27017,
    DatabaseName='source-database'
)

response = client.create_endpoint(
    EndpointIdentifier='target-endpoint',
    EndpointType='target',
    EngineName='docdb',
    Username='target-username',
    Password='target-password',
    ServerName='target-server',
    Port=27017,
    DatabaseName='target-database'
)

response = client.create_replication_instance(
    ReplicationInstanceIdentifier='replication-instance',
    ReplicationInstanceClass='dms.r5.large',
    EngineVersion='3.3.1',
    AllocatedStorage=100,
    VpcSecurityGroupIds=['security-group-id'],
    AvailabilityZone='us-east-1a',
    PubliclyAccessible=False,
    MultiAZ=False
)

response = client.create_replication_task(
    ReplicationTaskIdentifier='replication-task',
    SourceEndpointArn='source-endpoint-arn',
    TargetEndpointArn='target-endpoint-arn',
    MigrationType='full-load',
    TableMappings='table-mappings.json'
)

response = client.start_replication_task(
    ReplicationTaskArn='replication-task-arn',
    StartReplicationTaskType='start-replication'
)

上述代码示例中，我们使用AWS SDK for Python（Boto3）来调用AWS数据库迁移服务的API。具体的配置参数（如EndpointIdentifier、Username、Password等）需要根据实际情况进行设置。另外，TableMappings参数可以指定数据表的映射关系，以便在迁移过程中进行转换和转移数据。

以上代码示例仅提供一个基本的迁移框架，实际的迁移过程可能需要根据具体情况进行调整和扩展。