The data in the database need to be stored at several storage‐point in order to reduce the risk of data loss . Synchronization of heterogeneous database ,different scenes often use different algorithms to meet the actual demand .A da‐tabase synchronization method based on the recording mark according is proposed to the synchronization requirements of two heterogeneous databases .To achieve synchronization markers and business records binding ,store mark synchronization in‐formation in a column in a table .The data operation algorithms designed with the synchronization marker can achieve row granularity level of data synchronization .This algorithm is simple and reliable ,easy to implement ,has good performance , can realize certain double database hot standby function .This algorithm is implemented in the application layer ,application can fully control the data synchronization and only synchronize the business data needed synchronization .This algorithm has high flexibility and is suitable for the data synchronization between two heterogeneous databases .%数据库中的数据需要多点保存，以降低数据丢失的风险。异构数据库的同步，不同的场景往往采用不同的算法，以满足实际需求。论文针对两个异构数据库的同步需求，提出一种基于记录标记的数据库同步方法，把同步信息放在表中的标记列中，实现同步标记和业务记录的绑定；设计了数据操作算法，结合同步标记，可以达到行级的数据同步粒度。该算法简单可靠、易于实现、有很高的性能，能实现一定的双数据库热备功能。该算法在应用层实现，应用可以全面掌控数据同步操作，同步需要同步的业务数据，灵活性高，适合两个异构数据库间的数据同步。
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