translate replace差异

translate replace区别
数据：

fuyou@ORCL> select ename||sal from emp;ENAME||SAL------------------------SMITH800ALLEN1600WARD1250JONES2975MARTIN1250BLAKE2850CLARK3675SCOTT3000KING7500TURNER1500ADAMS1100JAMES950FORD3000MILLER1300已选择14行。

fuyou@ORCL>  select data ,translate(lower(data),'abcdefghijklmnopqrstuvwxyz',rpad('z',26,'z'))  2    from  3    ( select ename||sal  as data from emp);DATA                                                         TRANSLATE(LOWER(DATA),'ABCDEFGHIJKLMNOPQRSTUVWXYZ',RPAD('Z',26,'Z'))------------------------ ------------------------------------------------SMITH800                                                     zzzzz800ALLEN1600                                                    zzzzz1600WARD1250                                                     zzzz1250JONES2975                                                    zzzzz2975MARTIN1250                                                   zzzzzz1250BLAKE2850                                                    zzzzz2850CLARK3675                                                    zzzzz3675SCOTT3000                                                    zzzzz3000KING7500                                                     zzzz7500TURNER1500                                                   zzzzzz1500ADAMS1100                                                    zzzzz1100JAMES950                                                     zzzzz950FORD3000                                                     zzzz3000MILLER1300                                                   zzzzzz1300

fuyou@ORCL> select data ,replace(translate(lower(data),'abcdefghijklmnopqrstuvwxyz',rpad('z',26,'z')),'z')  2  from  3  ( select ename||sal  as data from emp);DATA                                                         REPLACE(TRANSLATE(LOWER(DATA),'ABCDEFGHIJKLMNOPQRSTUVWXYZ',RPAD('Z',26,'Z')),'Z')------------------------ ------------------------------------------------SMITH800                                                     800ALLEN1600                                                    1600WARD1250                                                     1250JONES2975                                                    2975MARTIN1250                                                   1250BLAKE2850                                                    2850CLARK3675                                                    3675SCOTT3000                                                    3000KING7500                                                     7500TURNER1500                                                   1500ADAMS1100                                                    1100JAMES950                                                     950FORD3000                                                     3000MILLER1300                                                   1300已选择14行。