1. A method for processing materialized tables in a multi-tenant application system, wherein in the multi-tenant application system, a plurality of tenants share one or more basic-tables, the method 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 patterns analyzed, grouping said plurality of tenants into a plurality of tenant groups; according to said plurality of tenant groups, constructing, by a processor, tenant group materialized tables from said one or more basic-tables.