Oracle中判斷字段是否有漢字

SELECT *

FROM table a

WHERE LENGTH (id) != LENGTHB (id);

Oracle 中length()與lengthb()區別

SQL> select length('姍姍') from dual;

LENGTH('姍姍')

--------------

2

SQL> select lengthb('姍姍') from dual;

LENGTHB('姍姍')

---------------

4

區別：length求得是字符長度，lengthb求得是字節長度。

 

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