select * from schema_version where 1 = 0 create table schema_version ( tableset_key varchar(255) not null, major_version int not null default 0, minor_version int not null default 0, primary key (tableset_key) ) alter table schema_version add tableset_key varchar(255) not null default '#DEFAULT_TABLESET_KEY#' alter table schema_version add primary key (tableset_key) insert into schema_version (tableset_key, major_version, minor_version ) values (, 0, 0 ) select major_version, minor_version from schema_version where tableset_key = update schema_version set major_version = , minor_version = where tableset_key =