Abstract: A method of application phased upgrade and phased user migration. In one embodiment, in one embodiment a first version of an application generates a first SQL insert statement, wherein the first SQL insert statement comprises a first table name, a first field name, and a first value. A second version of an application generates a second SQL insert statement, wherein the second SQL insert statement comprises the first table name, the first field name, and a second value. A database system inserts a first record into a first table in response to the database system receiving the first SQL insert statement. The database system inserts a second record into the first table via a view in response to the database system receiving the second SQL insert statement. The first record comprises distinct first and second fields corresponding to the first name and a second field name, respectively. The first field stores the first value.