How to fix ORA-00923: FROM keyword not found where

ora 923 Appear a error SQL Error [923] [42000]:. ORA is a salient tool for improving the postoperative refractive accuracy of trifocal IOL power calculations and may help in determining the need for toric

orang mati 4d bergambar, SQL Error: ORA-00923: FROM keyword not found where expected. Can anyone tell me where I'm going wrong with this? you don't need the WITHIN GROUP clause. it's ok.