WordPress:Database Description/2.2

The following is an outline and description of the database tables created during the standard installation of WordPress Version 2.2. The only database supported by WordPress Version 2.2 is MySQL version 4.0 or greater.

For the WordPress 2.0.x versions, see description of the database for WordPress 2.0.x.

Because WordPress interfaces with this database by itself, you as an end user, shouldn't have to worry much about its structure. If you're WordPress:Writing a Plugin, however, you may be interested in learning how to interface with the database directly. WordPress provides the wpdb Class to make this task easy.

Table Overview

This section is the overview of all the tables created during the WordPress standard installation. It is followed by specific information of what is in each table.

下面是在标准地安装WordPress2.2版本时，创建的数据库表格的大纲和描述。 当前，WordPress2.2版本支持的唯一的数据库是MySQL4.0版本或者更高的版本。

对于WordPress 2.0.x 版本,请看看description of the database for WordPress 2.0.x的数据库描述。

因为WordPress自身与这个数据库向联系，你作为一名终端用户，不应该太多地担忧数据库的结构。 如果你正编写一个插件，你可能对怎样直接操作数据库，感兴趣。 WordPress提供了wpdb Class，使得操作数据库，这个任务变得简单。

表格总览

这个部分是标准安装WordPress时，创建的表格的总览。 表格后面，有详细的信息，关于每个格是关于什么内容的。

WordPress 2.2 Tables (10)
Table Name	Description	Relevant Area(s) of WordPress User Interface
[[WordPress:#Table:_wp_categories|wp_categories]]	The categories for both posts and links are found within the wp_categories table.	WordPress:Administration Panels >> Manage >> Categories
[[WordPress:#Table:_wp_comments|wp_comments]]	The comments within WordPress are stored in the wp_comments table.	Comments are created by readers as responses to posts. Comments are managed by administrator via WordPress:Administration Panels >> Manage >> Comments
[[WordPress:#Table:_wp_link2cat|wp_link2cat]]	Each link in the wp_links table is associated with at least one category from the wp_categories table and this association is maintained in the wp_link2cat table.	WordPress:Administration Panels >> Blogroll >> Manage Blogroll WordPress:Administration Panels >> Blogroll >> Add Links
[[WordPress:#Table:_wp_links|wp_links]]	The wp_links holds information related to the links entered into the Blogroll Manager feature of WordPress.	WordPress:Administration Panels >> Blogroll >> Manage Blogroll WordPress:Administration Panels >> Blogroll >> Add Links WordPress:Administration Panels >> Blogroll >> Import Links
[[WordPress:#Table:_wp_options|wp_options]]	The Options set under the Administration > Options panel are stored in the wp_options table.	WordPress:Administration Panels >> Options > > General WordPress:Administration Panels >> Options > >Writing WordPress:Administration Panels >> Options > >Reading WordPress:Administration Panels >> Options > >Discussion WordPress:Administration Panels >> Options > >Permalinks WordPress:Administration Panels >> Options > >Miscellaneous
[[WordPress:#Table:_wp_post2cat|wp_post2cat]]	Each post in the wp_posts table is associated with at least one category from the wp_categories table and this association is maintained in the wp_post2cat table.	WordPress:Administration Panels >> Write >> Write Post WordPress:Administration Panels >> Manage >> Posts >> Edit
[[WordPress:#Table:_wp_postmeta|wp_postmeta]]	Each post features information called the meta data and it is stored in the wp_postmeta. Some tag plugins, and other plugins may add their own information to this table.	WordPress:Administration Panels >> Write >> Write a Post
[[WordPress:#Table:_wp_posts|wp_posts]]	The core of the WordPress data is the posts. It is stored in the wp_posts table.	WordPress:Administration Panels >> Write >> Write a Post
[[WordPress:#Table:_wp_usermeta|wp_usermeta]]	Each user features information called the meta data and it is stored in wp_usermeta.	WordPress:Administration Panels >> Users
[[WordPress:#Table:_wp_users|wp_users]]	The list of users is maintained in table wp_users.	WordPress:Administration Panels >> Users

WordPress 2.2 表格(10)
Table Name	描述	WordPress用户界面相关区域
[[WordPress:#Table:_wp_categories|wp_categories]]	可以在wp_categories表格中，找到文章和链接的 类别。	管理面板 >> 管理 >> 类别
[[WordPress:#Table:_wp_comments|wp_comments]]	WordPress内的评论储存在 wp_comments表格中。	评论是读者对于文章的评价。评论是由管理员通过管理面板 管理的>> 管理 >> 评论
[[WordPress:#Table:_wp_link2cat|wp_link2cat]]	Each link in the wp_links 表格中的每个链接 至少与wp_categories表格中的一个类别相关联，而且这种关联保存在wp_link2cat 表格。	管理面板 >> 友情链接 >> 管理友情链接 管理面板 >> 友情链接 >> 添加链接
管理面板 >> 链接 >> 管理链接 管理面板 >> 链接 >> Add Links|添加链接 管理面板 >> Links|链接 >> Import Links|导入链接
[[WordPress:#Table:_wp_options|wp_options]]	The 选项 设置在set under the 管理 > 选项 面板的下面，储存在wp_options 表格中。	管理面板 >> 选项 > > 总 管理面板 >> 选项 > >写 管理面板 >> 选项 > >阅读 管理面板 >> 选项 > >讨论 管理面板 >> 选项 > >Permalinks 管理面板 >> 选项 > >Miscellaneous
[[WordPress:#Table:_wp_post2cat|wp_post2cat]]	Each post in the wp_posts 表格中每篇文章 至少与来自wp_categories表格中的一个类别相联系，而且这种联系维持在wp_post2cat 表格。	管理面板 >> 写 >> 写文章 管理面板 >> 管理 >> 文章 >> 编辑
[[WordPress:#Table:_wp_postmeta|wp_postmeta]]	Each 每篇文章 都有称为meta data的信息，而且这个信息储存在 wp_postmeta。有的标签插件，和其它的插件，可能在这个表格中添加信息。	管理面板 >> 写 >> 写文章
[[WordPress:#Table:_wp_posts|wp_posts]]	WordPress数据的核心是文章。文章储存在wp_posts 表格。	管理面板 >> 写 >> 写文章
[[WordPress:#Table:_wp_usermeta|wp_usermeta]]	每个用户 都有称为meta data 的信息，而且这个信息储存在wp_usermeta。	管理面板 >> 用户
[[WordPress:#Table:_wp_users|wp_users]]	用户 列表保存在表格wp_users。	管理面板 >> 用户

Table Details

The following are the specific fields in each of the tables created during the standard WordPress installation.

表格详细信息

这个部分是标准安装WordPress时，每个表格中创建的特别的栏。

Table: wp_categories

Field	Type	Null	Key	Default	Extra
cat_ID	bigint(20)		PRI	NULL	auto_increment
cat_name	varchar(55)
category_nicename	varchar(200)		IND
category_description	longtext
category_parent	bigint(20)			0
category_count	bigint(20)			0
link_count	bigint(20)			0
posts_private	tinyint(1)			0
links_private	tinyint(1)			0

Table: wp_comments

Field	Type	Null	Key	Default	Extra
comment_ID	bigint(20) unsigned		PRI	NULL	auto_increment
comment_post_ID	int(11)		IND	0	FK->wp_posts.ID
comment_author	tinytext
comment_author_email	varchar(100)
comment_author_url	varchar(200)
comment_author_IP	varchar(100)
comment_date	datetime			0000-00-00 00:00:00
comment_date_gmt	datetime			0000-00-00 00:00:00
comment_content	text
comment_karma	int(11)			0
comment_approved	enum('0','1','spam')		IND	1
comment_agent	varchar(255)
comment_type	varchar(20)
comment_parent	bigint(20)			0	FK->wp_comment.ID
user_id	bigint(20)			0	FK->wp_users.ID

Table: wp_link2cat

Field	Type	Null	Key	Default	Extra
rel_id	bigint(20)		PRI	NULL	auto_increment
link_id	bigint(20)		IND Pt1	0	FK->wp_links.link_id
category_id	bigint(20)		IND Pt2	0	FK->wp_categories.cat_ID

Table: wp_links

Field	Type	Null	Key	Default	Extra
link_id	bigint(20)		PRI	NULL	auto_increment
link_url	varchar(255)
link_name	varchar(255)
link_image	varchar(255)
link_target	varchar(25)
link_category	bigint(20)		IND	0	FK->wp_categories.cat_ID
link_description	varchar(255)
link_visible	enum('Y','N')		IND	Y
link_owner	int(11)			1
link_rating	int(11)			0
link_updated	datetime			0000-00-00 00:00:00
link_rel	varchar(255)
link_notes	mediumtext
link_rss	varchar(255)

Table: wp_options

Field	Type	Null	Key	Default	Extra
option_id	bigint(20)		PRI	NULL	auto_increment
blog_id	int(11)		PRI	0
option_name	varchar(64)		PRI&IND
option_can_override	enum('Y','N')			Y
option_type	int(11)			1
option_value	longtext
option_width	int(11)			20
option_height	int(11)			8
option_description	tinytext
option_admin_level	int(11)			1
autoload	enum('yes','no')			yes

Table: wp_post2cat

Field	Type	Null	Key	Default	Extra
rel_id	bigint(20)		PRI	NULL	auto_increment
post_id	bigint(20)		IND Pt1	0	FK->wp_posts.ID
category_id	bigint(20)		IND Pt2	0	FK->wp_categories.cat_ID

Table: wp_postmeta

Field	Type	Null	Key	Default	Extra
meta_id	bigint(20)		PRI	NULL	auto_increment
post_id	bigint(20)		IND	0	FK->wp_posts.ID
meta_key	varchar(255)	YES	IND	NULL
meta_value	longtext	YES		NULL

Table: wp_posts

Field	Type	Null	Key	Default	Extra
ID	bigint(20) unsigned		PRI	NULL	auto_increment
post_author	bigint(20)			0	FK->wp_users.ID
post_date	datetime			0000-00-00 00:00:00
post_date_gmt	datetime			0000-00-00 00:00:00
post_content	longtext
post_title	text
post_category	int(4)			0	FK->wp_categories.cat_ID
post_excerpt	text
post_status	enum('publish','draft','private','static','object','attachment','inherit','future')		IND	publish
comment_status	enum('open','closed','registered_only')			open
ping_status	enum('open','closed')			open
post_password	varchar(20)
post_name	varchar(200)		IND
to_ping	text
pinged	text
post_modified	datetime			0000-00-00 00:00:00
post_modified_gmt	datetime			0000-00-00 00:00:00
post_content_filtered	text
post_parent	bigint(20)			0	FK->wp_posts.ID
guid	varchar(255)
menu_order	int(11)			0
post_type	varchar(100)
post_mime_type	varchar(100)
comment_count	bigint(20)			0

Table: wp_usermeta

Field	Type	Null	Key	Default	Extra
umeta_id	bigint(20)		PRI	NULL	auto_increment
user_id	bigint(20)			'0'	FK->wp_users.ID
meta_key	varchar(255)		IND	NULL
meta_value	longtext		IND	NULL

Table: wp_users

Field	Type	Null	Key	Default	Extra
ID	bigint(20) unsigned		PRI	NULL	auto_increment
user_login	varchar(60)		UNI & IND
user_pass	varchar(64)
user_nicename	varchar(50)
user_email	varchar(100)
user_url	varchar(100)
user_registered	datetime			0000-00-00 00:00:00
user_level	int(2) unsigned			0
user_activation_key	varchar(60)
user_status	int(11)			0
display_name	varchar(250)

表格: wp_categories

Field	Type	Null	Key	Default	Extra
cat_ID	bigint(20)		PRI	NULL	auto_increment
cat_name	varchar(55)
category_nicename	varchar(200)		IND
category_description	longtext
category_parent	bigint(20)			0
category_count	bigint(20)			0
link_count	bigint(20)			0
posts_private	tinyint(1)			0
links_private	tinyint(1)			0

表格: wp_comments

Field	Type	Null	Key	Default	Extra
comment_ID	bigint(20) unsigned		PRI	NULL	auto_increment
comment_post_ID	int(11)		IND	0	FK->wp_posts.ID
comment_author	tinytext
comment_author_email	varchar(100)
comment_author_url	varchar(200)
comment_author_IP	varchar(100)
comment_date	datetime			0000-00-00 00:00:00
comment_date_gmt	datetime			0000-00-00 00:00:00
comment_content	text
comment_karma	int(11)			0
comment_approved	enum('0','1','spam')		IND	1
comment_agent	varchar(255)
comment_type	varchar(20)
comment_parent	bigint(20)			0	FK->wp_comment.ID
user_id	bigint(20)			0	FK->wp_users.ID

表格: wp_link2cat

Field	Type	Null	Key	Default	Extra
rel_id	bigint(20)		PRI	NULL	auto_increment
link_id	bigint(20)		IND Pt1	0	FK->wp_links.link_id
category_id	bigint(20)		IND Pt2	0	FK->wp_categories.cat_ID

表格: wp_links

Field	Type	Null	Key	Default	Extra
link_id	bigint(20)		PRI	NULL	auto_increment
link_url	varchar(255)
link_name	varchar(255)
link_image	varchar(255)
link_target	varchar(25)
link_category	bigint(20)		IND	0	FK->wp_categories.cat_ID
link_description	varchar(255)
link_visible	enum('Y','N')		IND	Y
link_owner	int(11)			1
link_rating	int(11)			0
link_updated	datetime			0000-00-00 00:00:00
link_rel	varchar(255)
link_notes	mediumtext
link_rss	varchar(255)

表格: wp_options

Field	Type	Null	Key	Default	Extra
option_id	bigint(20)		PRI	NULL	auto_increment
blog_id	int(11)		PRI	0
option_name	varchar(64)		PRI&IND
option_can_override	enum('Y','N')			Y
option_type	int(11)			1
option_value	longtext
option_width	int(11)			20
option_height	int(11)			8
option_description	tinytext
option_admin_level	int(11)			1
autoload	enum('yes','no')			yes

表格: wp_post2cat

Field	Type	Null	Key	Default	Extra
rel_id	bigint(20)		PRI	NULL	auto_increment
post_id	bigint(20)		IND Pt1	0	FK->wp_posts.ID
category_id	bigint(20)		IND Pt2	0	FK->wp_categories.cat_ID

表格: wp_postmeta

Field	Type	Null	Key	Default	Extra
meta_id	bigint(20)		PRI	NULL	auto_increment
post_id	bigint(20)		IND	0	FK->wp_posts.ID
meta_key	varchar(255)	YES	IND	NULL
meta_value	longtext	YES		NULL

表格: wp_posts

Field	Type	Null	Key	Default	Extra
ID	bigint(20) unsigned		PRI	NULL	auto_increment
post_author	bigint(20)			0	FK->wp_users.ID
post_date	datetime			0000-00-00 00:00:00
post_date_gmt	datetime			0000-00-00 00:00:00
post_content	longtext
post_title	text
post_category	int(4)			0	FK->wp_categories.cat_ID
post_excerpt	text
post_status	enum('publish','draft','private','static','object','attachment','inherit','future')		IND	publish
comment_status	enum('open','closed','registered_only')			open
ping_status	enum('open','closed')			open
post_password	varchar(20)
post_name	varchar(200)		IND
to_ping	text
pinged	text
post_modified	datetime			0000-00-00 00:00:00
post_modified_gmt	datetime			0000-00-00 00:00:00
post_content_filtered	text
post_parent	bigint(20)			0	FK->wp_posts.ID
guid	varchar(255)
menu_order	int(11)			0
post_type	varchar(100)
post_mime_type	varchar(100)
comment_count	bigint(20)			0

表格: wp_usermeta

Field	Type	Null	Key	Default	Extra
umeta_id	bigint(20)		PRI	NULL	auto_increment
user_id	bigint(20)			'0'	FK->wp_users.ID
meta_key	varchar(255)		IND	NULL
meta_value	longtext		IND	NULL

表格: wp_users

Field	Type	Null	Key	Default	Extra
ID	bigint(20) unsigned		PRI	NULL	auto_increment
user_login	varchar(60)		UNI & IND
user_pass	varchar(64)
user_nicename	varchar(50)
user_email	varchar(100)
user_url	varchar(100)
user_registered	datetime			0000-00-00 00:00:00
user_level	int(2) unsigned			0
user_activation_key	varchar(60)
user_status	int(11)			0
display_name	varchar(250)