I have to divide two fields and put the result in another field. I am just starting out with the select statement of the equation itself, but am getting a strange error message. I am putting the code and error mesage here, if someone can assist me. select (rp2.RESOURCE_AMOUNT / rp1.TOTAL_PRECOLA_PAID) from RP08_R2_RETRO_PAY_SUM r2, rp08_r2_empl * ERROR at line 1: ORA-00904: "RP2"."RESOURCE_AMOUNT": invalid identifier SQL> SQL> Thanks for any help, Eileen La Fond Phone (206) 386-0011 e.mail Eileen.LaFond@xxxxxxxxxxx __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind