我需要在2个表之间执行计数

i need to perform a command that would show where in the table "Ismatuota tarša" column Dalelės_kiekis is more then table "Taršos norma" column Ribinė_valandos. Anyone has idea how to do it ? Its like i have many measures of pollution, Dalelės kiekis is the amount of any pollution and Ribinė valandos is a norm for that? Please help.i need to perform a command that would show whe