In your query only USER_ID column in the where condition is not specified with a table name. I guess USER_ID is there in multiple table. Try the where condition with proper table name SELECT INDIVIDUAL.INV_FNAME, INDIVIDUAL.INV_LNAME, INDIVIDUAL.INV_IC_NUM, CUSTOMER.MEMBER_LEVEL, CUSTOMER.MEMBER_POINT_BALANCE, CUSTOMER.MEMBER_DISCOUNT_RATE, PROGRAM_USER.USER_CONTACT_NUM, PROGRAM_USER.USER_ADDRESS, PROGRAM_USER.USER_CITY, PROGRAM_USER.USER_STATE, PROGRAM_USER.USER_ZIP_CODE, PROGRAM_USER.USER_COUNTRY, PROGRAM_USER.USER_EMAIL FROM PROGRAM_USER,CUSTOMER,INDIVIDUAL WHERE PROGRAM_USER.USER_ID = ‘san’; Also like … Read more