4. The method of claim 1 , wherein grouping one or more WMQTs and one or more BMQTs into one or more groups further comprises grouping one or more WMQTs, one or more BMQTs and one or more other candidates into one or more groups to merge into a set of a smaller number of MQTs and to cover the workload.
4. The method of claim 1 , wherein grouping one or more WMQTs and one or more BMQTs into one or more groups further comprises grouping one or more WMQTs, one or more BMQTs and one or more other candidates into one or more groups to merge into a set of a smaller number of MQTs and to cover the workload. 5. The method of claim 4 , wherein grouping one or more WMQTs, one or more BMQTs and one or more other candidates into one or more groups to merge into a set of a smaller number of MQTs comprises performing merging of select and aggregation columns.