SQL> create table ware(dep number, article varchar2(10), price number, date1 date);

Table created
SQL> create table ware_log(dep number, article varchar2(10), price number, date1 date, kto varchar2(50), kogda date, chto varchar2 (10));

Table created
SQL> create trigger ware_trg after insert or update or delete on ware for each row
  2  begin
  3    if inserting then
  4      insert into ware_log
  5      values(:new.dep, :new.article, :new.price, :new.date1, user, sysdate, 'INS');
  6    elsif updating then
  7      insert into ware_log
  8      values(:new.dep, :new.article, :new.price, :new.date1, user, sysdate, 'UPD');
  9    else
 10      insert into ware_log
 11      values(:old.dep, :old.article, :old.price, :old.date1, user, sysdate, 'DEL');
 12    end if;
 13  end;
 14  /

Trigger created
SQL> insert into ware values(1, '123', 10, sysdate);

1 row inserted
SQL> insert into ware values(2, '233', 20, sysdate);

1 row inserted
SQL> update ware set dep = 3 where article = '233';

1 row updated
SQL> delete from ware where article = '123';

1 row deleted
SQL> select * from ware_log;

       DEP ARTICLE         PRICE DATE1       KTO                                                KOGDA       CHTO
---------- ---------- ---------- ----------- -------------------------------------------------- ----------- ----------
         1 123                10 28.03.2018  SYSTEM                                             28.03.2018  INS
         2 233                20 28.03.2018  SYSTEM                                             28.03.2018  INS
         3 233                20 28.03.2018  SYSTEM                                             28.03.2018  UPD
         1 123                10 28.03.2018  SYSTEM                                             28.03.2018  DEL

SQL>