translate replace區別

數據：

fuyou@ORCL> select ename||sal from emp;

ENAME||SAL
------------------------------------------------------------
SMITH800
ALLEN1600
WARD1250
JONES2975
MARTIN1250
BLAKE2850
CLARK3675
SCOTT3000
KING7500
TURNER1500
ADAMS1100
JAMES950
FORD3000
MILLER1300

已選擇14行。

利於translate將字母全部改成z

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                                                     zzzzz800
ALLEN1600                                                    zzzzz1600
WARD1250                                                     zzzz1250
JONES2975                                                    zzzzz2975
MARTIN1250                                                   zzzzzz1250
BLAKE2850                                                    zzzzz2850
CLARK3675                                                    zzzzz3675
SCOTT3000                                                    zzzzz3000
KING7500                                                     zzzz7500
TURNER1500                                                   zzzzzz1500
ADAMS1100                                                    zzzzz1100
JAMES950                                                     zzzzz950
FORD3000                                                     zzzz3000
MILLER1300                                                   zzzzzz1300

利於replace刪除z

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                                                     800
ALLEN1600                                                    1600
WARD1250                                                     1250
JONES2975                                                    2975
MARTIN1250                                                   1250
BLAKE2850                                                    2850
CLARK3675                                                    3675
SCOTT3000                                                    3000
KING7500                                                     7500
TURNER1500                                                   1500
ADAMS1100                                                    1100
JAMES950                                                     950
FORD3000                                                     3000
MILLER1300                                                   1300

已選擇14行。

translate 是對每字符替換

replace 字符串刪除