for update 的使用例子

WHERE CURRENT OF WHERE CURRENT OF YOUR_CURSOR_NAME 其实还是很有用的，特别是在循环游标中。

例如：需要把所有job=SALESMAN的加5%的工资。

=CLERK的加10%的工资。

=MANAGER加15%的工资。

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CODE:
declare

cursor myc is

select * from emp for update;

begin

for v_row in myc loop

if v_row.job='SALESMAN' then

update emp set sal=sal*1.05 where current of myc;

elsif v_row.job='CLERK' then

update emp set sal=sal*1.10 where current of myc;

elsif v_row.job='MANAGER' then

update emp set sal=sal*1.15 where current of myc;

end if;

end loop;

commit;

exception

when others then

rollback;

raise;

end;