SQL> select * from dept1 where deptno=20;
DEPTNO DNAME LOC
---------- -------------- -------------
20 RESEARCH DALLAS
SQL> declare
2 v_deptno dept.deptno%TYPE :=20;
3 V_loc dept.loc%TYPE :='BEIJING';
4 begin
5 update dept1 set loc=v_loc where deptno=v_deptno;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select * from dept1 where deptno=20;
DEPTNO DNAME LOC
---------- -------------- -------------
20 RESEARCH BEIJING