oracle 字符长度函数及实例教程
-- oracle 里面使用 lengthb
sql> select lengthb('123456') from dual;
lengthb('123456')
-----------------
                6
sql> select lengthb('123456天津') from dual;
lengthb('123456天津')
---------------------
> select char_length('123456');
+-----------------------+
| char_length('123456') |
+-----------------------+
|                     6 |
+-----------------------+
1 row in set (0.00 sec)
mysql> select char_length('123456天津');
+---------------------------+
| char_length('123456天津')     |
+---------------------------+
|                        10 |
+---------------------------+
1 row in set (0.00 sec)
mysql>
实例三
sql> select lengthb('123456') from dual;
lengthb('123456')
-----------------
                6
sql> select lengthb('123456天津') from dual;
lengthb('123456天津')
---------------------
                   10
sql>