[摘要]+------------------------+1 row in set (0.00 sec)12、substring(string, start_pos, length); //从string...
+------------------------+
1 row in set (0.00 sec)12、substring(string, start_pos, length); //从string的start_pos开始，取length个字符 mysql> select substring('lengxuegang', 5, 3);
+--------------------------------+
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