length
Description
Syntax
‘INT length (VARCHAR str)’
Returns the length of the string and the number of characters returned for multi-byte characters. For example, five two-byte width words return a length of 10.
example
mysql> select length("abc");
+---------------+
length ('abc') 1244;
+---------------+
| 3 |
+---------------+
mysql> select length("中国");
+------------------+
| length('中国') |
+------------------+
| 6 |
+------------------+