plsql - Inserting new id from sequence into table column id and insert that same id to another table without dual table -

i have table:

create table osoba (osoba_id number,                     ime_osobe varchar2(200),                     prezime_osobe varchar2(200),                     kartica_id number)  create table kartica (kartica_id number,                       dozvoljen_ulaz_id number) 

i need make procedure that

• inserts data table osoba.
• checks if there data in table kartica column kartica_id.
  • if there is, add id column kartica_id in table osoba.
  • if there isn't, add kartica_id in kartica table sequence have created , add newly created kartica.kartica_id kartica_id in table osoba.

kartica_id in kartica , kartica_id in osoba must unique , 1 kartica_id 1 record in osoba exact record (person added).

if there kartica_id added osoba.kartica_id of same value throw error message 'kartica_id exists. no same values allowed.' , insert next new kartica_id value kartica table , pass value kartica_id in table osoba.

i'm new pl/sql got far:

create or replace procedure insertosoba    ( o_osoba_id in osoba.osoba_id%type default generate_id.nextval,      o_ime_osobe in osoba.ime_osobe%type,      o_prezime_osobe in osoba.prezime_osobe%type,      o_kartica_id in kartica.kartica_id%type default null --must optional    ) begin       insert osoba (osoba_id,ime_osobe,prezime_osobe,kartica_id)       values (o_osoba_id,o_ime_osobe,o_prezime_osobe,o_kartica_id); end insertosoba; 

i'm posting solution use kartica_seq sequence kartica_id. please replace sequence name or create sequence if not exist.

create sequence kartica_seq start 1 increment 1;

create or replace procedure insertosoba    ( o_osoba_id in osoba.osoba_id%type default generate_id.nextval,      o_ime_osobe in osoba.ime_osobe%type,      o_prezime_osobe in osoba.prezime_osobe%type,      o_kartica_id in kartica.kartica_id%type default null --must optional    ) cnt number; cnt2 number; begin       select count(*) cnt osoba kartica_id = o_kartica_id;       select count(*) cnt2 kartica kartica_id = o_kartica_id;       if(cnt = 0)         --there no person such kartica , user passed existing kartica_id         if(o_kartica_id not null , cnt2 > 0)           insert osoba (osoba_id,ime_osobe,prezime_osobe,kartica_id)           values (o_osoba_id,o_ime_osobe,o_prezime_osobe,o_kartica_id);         --there no person such kartica need create 1 entry using sequence         else           insert kartica (kartica_id) values (kartica_seq.nextval);           insert osoba (osoba_id,ime_osobe,prezime_osobe,kartica_id)           values (o_osoba_id,o_ime_osobe,o_prezime_osobe,kartica_seq.currval);         end if;       end if;       --there person such kartica       if(cnt > 0)         dbms_output.put_line('kartica_id exists. no same values allowed.'); --or raise exception here       end if;       commit; end insertosoba;