通过脚本更改字段和端口mysql表数据？

Question

mysql> desc oldtable; 
+---------------+--------------+------+-----+---------+----------------+ 
| Field   | Type   | Null | Key | Default | Extra   | 
+---------------+--------------+------+-----+---------+----------------+ 
| uid   | int(11)  | NO | PRI | NULL | auto_increment | 
| active  | char(1)  | NO |  | NULL |    | 
+---------------+--------------+------+-----+---------+----------------+ 


mysql> desc newtable; 
+------------+--------------+------+-----+---------+----------------+ 
| Field  | Type   | Null | Key | Default | Extra   | 
+------------+--------------+------+-----+---------+----------------+ 
| uid  | int(11)  | NO | PRI | NULL | auto_increment | 
| active  | tinyint(1) | NO |  | 0  |    | 
+------------+--------------+------+-----+---------+----------------+ 

我想从旧表中移植数据（转储）到newtable。一个问题是，表早些时候使用char（1）作为活动，它存储值'Y'或'N'。现在新表将其存储为int或1或0.

如何在移植数据之前解决此问题？我应该使用shell脚本进行这种修复&移植吗？ 任何示例脚本或提示:)

Answer 1

INSERT INTO newtable 
SELECT uid,IF(active='Y',1,0) as active FROM oldtable 

应该做的伎俩

Answer 2

INSERT INTO newtable (uid, active) 
    SELECT uid, IF(active='Y', 1, 0) AS active 
    FROM oldtable 

文档此语法在这里：http://dev.mysql.com/doc/refman/5.0/en/ansi-diff-select-into-table.html

Answer 3

戏说版：

INSERT INTO newtable 
SELECT uid,FIELD(active,'Y') as active 
FROM oldtable