如何在mysql数据库中插入新字段

Question

Let assume we've database table My_table with (id-name)

CREATE TABLE `drink` (
`id` int(5) NOT NULL auto_increment,
`name` varchar(64) NOT NULL default '',
PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=9034 ;

INSERT INTO `My_table` VALUES (1, 'my name is someone');

How to automate adding new fields using php or something else so that it can be (id-new-name)

and where new = name after we replace spaces to - using

$new = str_replace(' ', '-', trim($name));

so the table become

CREATE TABLE `drink` (
`id` int(5) NOT NULL auto_increment,
`new` varchar(64) NOT NULL default '',
`name` varchar(64) NOT NULL default '',
PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=9034 ;

INSERT INTO `My_table` VALUES (1, 'my-name-is-someone', 'my name is someone');

I'd like to operate it cause it has half million of lines and impossible to do it manually so any idea!

Thanks for help.

Answer 1

You might want to do that:

1. Adding a new column to the table:

   ALTER TABLE drink ADD new varchar(100) after id;

2. Setting values for the new column using the pattern you described:

   UPDATE drink SET new = REPLACE(name, ' ', '-');

RESOURCES:

• http://dev.mysql.com/doc/refman/5.5/en/alter-table.html

• http://dev.mysql.com/doc/refman/5.0/en/string-functions.html

Answer 2

当您在MySQL中插入任何内容时，您必须指定列。像这样的INSERT INTO banans ( id , sort ) VALUES ('1','Green')

Answer 3

If you only need the value back, and don't need to search by new , you can:

SELECT id, REPLACE(name, ' ','-') AS new, name
FROM drink

Answer 4

与Macovei所建议的类似，您可以通过执行以下操作在插入新记录时生成新名称：

INSERT INTO drink (new, name) VALUES ('the name', REPLACE('the name', ' ', '-'))