這個本身屬於MySQL的基本語法，我這裡給出一個例子而已。

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1. mysql> -- 測試資料庫在指定位置增加欄位  
2. mysql> drop table if exists t;  
3. Query OK, 0 rows affected (0.06 sec)  
4. mysql> create table t(age int,address varchar(50));  
5. Query OK, 0 rows affected (0.06 sec)  
6. mysql> desc t;  
7. +---------+-------------+------+-----+---------+-------+  
8. | Field   | Type        | Null | Key | Default | Extra |  
9. +---------+-------------+------+-----+---------+-------+  
10. | age     | int(11)     | YES  |     | NULL    |       |  
11. | address | varchar(50) | YES  |     | NULL    |       |  
12. +---------+-------------+------+-----+---------+-------+  
13. 2 rows in set (
    0.02 sec)  
14. mysql> alter table t add column name varchar(20) after age;  
15. Query OK, 0 rows affected (0.16 sec)  
16. Records: 0  Duplicates: 0  Warnings: 0
17. mysql> desc t;  
18. +---------+-------------+------+-----+---------+-------+  
19. | Field   | Type        | Null | Key | Default | Extra |  
20. +---------+-------------+------+-----+---------+-------+  
21. | age     | int(11)     | YES  |     | NULL    |       |  
22. | name    | varchar(20) | YES  |     | NULL    |       |  
23. | address | varchar(50) | YES  |     | NULL    |       |  
24. +---------+-------------+------+-----+---------+-------+  
25. 3 rows in set (0.00 sec)  
26. mysql> alter table t add column id int FIRST;  
27. Query OK, 0 rows affected (0.13 sec)  
28. Records: 0  Duplicates: 0  Warnings: 0
29. mysql> desc t;  
30. +---------+-------------+------+-----+---------+-------+  
31. | Field   | Type        | Null | Key | Default | Extra |  
32. +---------+-------------+------+-----+---------+-------+  
33. | id      | int(11)     | YES  |     | NULL    |       |  
34. | age     | int(11)     | YES  |     | NULL    |       |  
35. | name    | varchar(20) | YES  |     | NULL    |       |  
36. | address | varchar(50) | YES  |     | NULL    |       |  
37. +---------+-------------+------+-----+---------+-------+  
38. 4 rows in set (0.00 sec)  
39. mysql>  

mysql> -- 測試資料庫在指定位置增加欄位mysql> drop table if exists t;Query OK, 0 rows affected (0.06 sec)mysql> create table t(age int,address varchar(50));Query OK, 0 rows affected (0.06 sec)mysql> desc t;+---------+-------------+------+-----+---------+-------+| Field   | Type        | Null | Key | Default | Extra |+---------+-------------+------+-----+---------+-------+| age     | int(11)     | YES  |     | NULL    |       || address | varchar(50) | YES  |     | NULL    |       |+---------+-------------+------+-----+---------+-------+2 rows in set (0.02 sec)mysql> alter table t add column name varchar(20) after age;Query OK, 0 rows affected (0.16 sec)Records: 0  Duplicates: 0  Warnings: 0mysql> desc t;+---------+-------------+------+-----+---------+-------+| Field   | Type        | Null | Key | Default | Extra |+---------+-------------+------+-----+---------+-------+| age     | int(11)     | YES  |     | NULL    |       || name    | varchar(20) | YES  |     | NULL    |       || address | varchar(50) | YES  |     | NULL    |       |+---------+-------------+------+-----+---------+-------+3 rows in set (0.00 sec)mysql> alter table t add column id int FIRST;Query OK, 0 rows affected (0.13 sec)Records: 0  Duplicates: 0  Warnings: 0mysql> desc t;+---------+-------------+------+-----+---------+-------+| Field   | Type        | Null | Key | Default | Extra |+---------+-------------+------+-----+---------+-------+| id      | int(11)     | YES  |     | NULL    |       || age     | int(11)     | YES  |     | NULL    |       || name    | varchar(20) | YES  |     | NULL    |       || address | varchar(50) | YES  |     | NULL    |       |+---------+-------------+------+-----+---------+-------+4 rows in set (0.00 sec)mysql>

相關的語法描述為

ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name    alter_specification [, alter_specification] ...alter_specification:    table_option ...  | ADD [COLUMN] col_name column_definition        [FIRST | AFTER col_name ]