thank you all, i have a query like this now to get the memory utilization of all column tables in schema SAP_ECC, do i need to also check if the tables are loaded, how do we find the memory usage if the table is not loaded .
select sum(round(MEMORY_SIZE_IN_TOTAL/1024/1024, 2)) as"MB"FROM M_CS_TABLES WHERE SCHEMA_NAME = 'SAP_ECC'