Update a table using plsql procedure

Question

Can any one help me to write a plsql procedure to update a table with new records and changes;
Table rtest1 contains following records:
deptno(number) deptname(varchar2(10)
10 EWP
20 PWD
30 EPF
Table rtest2 contains follwing records:
deptno(number) deptname(varchar2(10)
10 prod
40 ops
how to write a plsql procedure to to update table rtest2 using rtest1 data .

Answer 1

use a merge statement, like this:
SQL> create table rtest1
  2  as
  3  select 10 deptno, 'EWP' deptname from dual union all
  4  select 20, 'PWD' from dual union all
  5  select 30, 'EPF' from dual
  6  /
Tabel is aangemaakt.
SQL> create table rtest2
  2  as
  3  select 10 deptno, 'prod' deptname from dual union all
  4  select 40, 'ops' from dual
  5  /
Tabel is aangemaakt.
SQL> create procedure my_merge
  2  is
  3  begin
  4    merge into rtest2 r2
  5    using (select deptno, deptname from rtest1) r1
  6       on (r2.deptno = r1.deptno)
  7     when matched then
  8          update set deptname = r1.deptname
  9     when not matched then
10          insert (deptno,deptname) values (r1.deptno,r1.deptname)
11    ;
12  end;
13  /
Procedure is aangemaakt.
SQL> exec my_merge
PL/SQL-procedure is geslaagd.
SQL> select * from rtest2 order by deptno
  2  /
                                DEPTNO DEPT
                                    10 EWP
                                    20 PWD
                                    30 EPF
                                    40 ops
4 rijen zijn geselecteerd.Regards,
Rob.