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declare
  salary number(6,2);
  sql_sta varchar2(100);
begin
  sql_sta := 'update employee set sal = sal *(1 + :percent/100)' ||
  ' where employeeno = :eno 
  returning sal into :salary';
  execute immediate sql_sta using &1,&2 returning into salary;
  dbms_output.put_line('й¤×Ê£º'||salary);
end;
/
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sql_sta varchar2(2000);

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