摘要： 表中添加字段　mysql> alter table leaf add leaf_pri int(5);Query OK, 4 rows affected (0.06 sec)Records: 4 Duplicates: 0 Warnings: 0mysql> select * from leaf;+---------+-----------+----------+----------+----------+------------+----------+| leaf_id | leaf_name | leaf_age | leaf_sal | leaf_sex | leaf_bir 阅读全文