1. A method for processing materialized tables in a multi-tenant application system, wherein the multi-tenant application system, a plurality of tenants share one or more basic-tables, the methods comprising: According to data access history information of said plurality of tenants, analyzing a similarity of update patterns for said one or more basic-tables by said plurality of tenants; According to said similarity of update pattern analyzed, grouping said plurality of tenants into a plurality of tenant groups; According to said similarity of update patterns, constructing, by a processor, tenant group materialized tables from said one or more basic-tables.