PL SQL触发器当插入一个表插入另一个表

Question

I attached two table below I need a trigger when insert do_chd table in same time insert in do_chd_hist table And DO_MST table to DO_MST_HIST TAbLE

create table do_mst
 ( fdo_no varchar2(14) not null,
 fdo_date date not null,
 code_db varchar2(11),
 db_name varchar2(25),
 code_sdb varchar2(11),
 sdb_name varchar2(25),
 code_sst varchar2(11),
 sst_name varchar2(25),
 constraint fdo_no_pk primary key(fdo_no)
 );

create table do_mst_hist
 ( fdo_no varchar2(14) not null,
 fdo_date date not null,
 code_db varchar2(11),
 db_name varchar2(25),
 code_sdb varchar2(11),
 sdb_name varchar2(25),
 code_sst varchar2(11),
 sst_name varchar2(25),
 constraint fdo_no_pk primary key(fdo_no)
 );

create table do_chd
 ( fdo_no varchar2(14) not null,
 itemcode varchar2(11) not null,
 name varchar(27) not null,
 unit_price varchar2(11),
 req_qty number(11) not null,
 total_price number(14),
 unit varchar2(7),
 constraint fdo_no_fk foreign key(fdo_no)
 references do_mst(fdo_no)
 );

create table do_chd_hist
 ( fdo_no varchar2(14) not null,
 itemcode varchar2(11) not null,
 name varchar(27) not null,
 unit_price varchar2(11),
 req_qty number(11) not null,
 total_price number(14),
 unit varchar2(7),
 constraint fdo_no_fk foreign key(fdo_no)
 references do_mst(fdo_no)
 );

Can anybody help me to write this trigger?

Answer 1

While I agree with what being said in the comments, I don't think there's a reason to think twice about writing up a create trigger syntax, and I'm happy to show you the solution to your problem:

CREATE OR REPLACE TRIGGER do_chd_insert_trg
  AFTER INSERT do_chd
  FOR EACH ROW
DECLARE
    sal_diff number;
BEGIN
    insert into do_chd_hist
    values (new.fdo_no, new.itemcode, new.name, new.unit_price, new.req_try, new.total_price, new.unit);
END;
/

You can use this syntax to generate the trigger to the second table, after changing the respectable column names. You can read more about oracle trigger syntax here - https://docs.oracle.com/cd/B19306_01/appdev.102/b14251/adfns_triggers.htm