1. A computation system to process data, comprising: a network interface to receive operational related data relating to an Information Technology (IT) environment of an organization over a network; a memory device to store at least instructions and a data processing engine that is coupled to the network interface; and a processor device that executes the instructions and the data processing engine to perform actions, including: employing a schema generator to generate a schema by organizing at least part of the operational related data into at least one class of IT metric-oriented data based on at least one intrinsic characteristic of the operational related data; generating at least one weak mapping table for determining a relationship between a plurality of source tables that lack an explicit mapping between respective source tables based on customizable linking rules, a target probability, and a target cardinality; employing the organized data and the at least one weak mapping table to generate a destination table and a result table based on each row and column of a starting table and the columns of each other table that is related to the starting table, wherein any determined path between related tables is based on a dictionary concept that lists at least one or more columns; comparing at least a portion of the organized data of the schema in the destination table to at least a portion of the organized data of at least another schema in another destination table that is generated with other operational related data relating to the IT environment; and comparing at least a portion of the organized data of the schema in the result table to at least a portion of the organized data of at least the other schema in another result table that is generated with other operational related data relating to the IT environment, wherein at least one row and at least one cell of the result table is re-ordered and filtered in accordance with a key of the starting table and further re-ordered and collapsed in accordance with a cardinality, and wherein a presentation of the result table comparison enables identifying a change in the schema over time.