--按照salgrade表中的标准, --给员工加薪,1:5%,2:4%,3:3%,4:2%,5:1%,

declaer cursor s1 is selcet * from emp;  v_res emp%rowtype;    begin    open s1;    fetch s1 into v_res;    loop      exit when s1%notfound;      if        v_res.job='PRESIDENT' then        update emp
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