Study and Implementation of Transaction Consistency in Information System

In application levels,database consistency is manifestsed through transaction consistency.After introducing the concept of consistency in and between transactions,the techniques of concurrency control on the basis of lock mechanism and commitment control on the basis of journal are discussed,respectively.The compensation of transactions is also analysed.Taking DB2/400 database as example,the detail discusses about the method of transaction integrity and database consistency are presented.An application programme is given to show the consistency of DB2/400 database.The proposed method is proved reliable and effective in applications.