Insert Records in one table that's not in other table

Question

Really need your help, I have spent the last five hours on the following code, but can't get it working. What I want done is INSERT records in persons where the same records do not exist in table new_person.
see the below error: rror at Command Line:1 Column:441
Error report:
SQL Error: ORA-00936: missing expression
00936. 00000 - "missing expression"
INSERT INTO person (last_name, first_name, mi, full_name, id_number, rank, rank_value, temporary, group_number, status, classification, hire_date, unit_code, phone_update, agency, username, agencycourtcode) select last, first_name, mi, full_name, id_number, rank, rank_value, temporary, group_number, status, classification, hire_date, unitcode, phone_update, 'MSP', 'MSP'||id_number, 'MSP' from new_person a where a.status= 'Active' AND where not exists (select last_name, first_name, mi, full_name, id_number, rank, rank_value, group_number, status, classification, hire_date, unit_code, phone_update, agency, username, agencycourtcode from person where a.id_number = person.id_number);

Answer 1

Please post your code using tags as this is pretty much unreadable.  See instructions here: http://forums.oracle.com/forums/help.jspa
But it looks to me like your INSERT has 16 columns and your SELECT has 17, so you probably have something misaligned.
Also, you have AND WHERE NOT EXISTS, change it to AND NOT EXISTS.
Also, the select list in your NOT EXISTS subquery doesn't need all those columns.  Just do a SELECT 1.  Oracle doesn't care about the columns only whether a row exists.