DATABASE SERVER DEVICE, METHOD FOR UPDATING DATABASE AND DATABASE UPDATE PROGRAM

PROBLEM TO BE SOLVED: To simultaneously execute conflicting transactions.SOLUTION: A database server stores committing procedure information for committing each of a plurality of transactions that updates stored data. Also, when receiving a transaction for updating data, the database server executes the transaction to create update data to be committed from the stored data. For committing transactions, the database server determines whether there is a committed transaction having created committed data from the stored data as update source data. Then, when there is the committed transaction, the database server commits transactions by re-updating the update data to be committed according to the committed data and committing procedure information.