Patent ID: 7461097

Claim:
A method for migrating content from a source table in a source database to a target table in a target database, wherein the databases are physically different, the method comprising: storing entries corresponding to database instructions in at least one of the source table and the target table, with a business application consecutively sending database instructions to the source database before migrating, the business application consecutively sending database instructions to the target database after migrating, each entry in each table having a unique key, and the database instructions having action types; storing representations, for at least one entry in the source table, of an action type and of the unique key in a log table under a condition that the action type coincides with a predetermined action type; copying entries of the source table to the target table; removing representations from the log table of the entries copied from the source table to the target table; adjusting the entries in the target table that have keys represented in the log table according to the action type representations stored in the log table; and removing representations from the log table of the entries adjusted in the target table, wherein copying the entries comprises converting a coding of each entry, and wherein adjusting the entries is performed in a first adjustment period while the business application is sending database instructions and in a second adjustment period while the business application is not sending database instructions.