SQLServer中获取所有数据库名、表名、字段名以及描述

1. 获取所有的数据库的信息

SELECT * FROM MASTER.DBO.SYSDATABASES

2. 获取所有数据表名

XTYPE

• U 代表用户创建的表
• S 代表系统表

SELECT * FROM sys.SYSOBJECTS WHERE XTYPE='U'

3. 查看某表内的所有列

SELECT * FROM sys.SYSCOLUMNS WHERE ID IN (SELECT ID FROM sys.SYSOBJECTS WHERE XTYPE='U' AND NAME = '表名')

4. 查看某表内的所有列(包含描述)

SELECT * FROM sys.extended_properties
LEFT JOIN sys.SYSOBJECTS ON sys.SYSOBJECTS.id = sys.extended_properties.major_id
LEFT JOIN INFORMATION_SCHEMA.columns ON (INFORMATION_SCHEMA.columns.ORDINAL_POSITION = sys.extended_properties.minor_id AND INFORMATION_SCHEMA.columns.TABLE_NAME = sys.SYSOBJECTS.name)
WHERE major_id IN (SELECT ID FROM sys.SYSOBJECTS WHERE XTYPE='U' AND NAME = '表名') AND INFORMATION_SCHEMA.columns.TABLE_NAME is not null

-- 提取适当的列
SELECT
INFORMATION_SCHEMA.columns.TABLE_CATALOG AS 数据库名,
INFORMATION_SCHEMA.columns.TABLE_NAME AS 表名,
INFORMATION_SCHEMA.columns.COLUMN_NAME AS 列名,
INFORMATION_SCHEMA.columns.DATA_TYPE AS 数据类型,
INFORMATION_SCHEMA.columns.CHARACTER_MAXIMUM_LENGTH AS varchar长度,
sys.extended_properties.value AS 描述
FROM sys.extended_properties
LEFT JOIN sys.SYSOBJECTS ON sys.SYSOBJECTS.id = sys.extended_properties.major_id
LEFT JOIN INFORMATION_SCHEMA.columns ON (INFORMATION_SCHEMA.columns.ORDINAL_POSITION = sys.extended_properties.minor_id AND INFORMATION_SCHEMA.columns.TABLE_NAME = sys.SYSOBJECTS.name)
WHERE major_id IN (SELECT ID FROM sys.SYSOBJECTS WHERE XTYPE='U' AND NAME = '表名') AND INFORMATION_SCHEMA.columns.TABLE_NAME is not null

5.  获取数据库中所有的表(包含描述)

SELECT * FROM sys.extended_properties
LEFT JOIN sys.SYSOBJECTS ON sys.SYSOBJECTS.id = sys.extended_properties.major_id
LEFT JOIN INFORMATION_SCHEMA.columns ON (INFORMATION_SCHEMA.columns.ORDINAL_POSITION = sys.extended_properties.minor_id AND INFORMATION_SCHEMA.columns.TABLE_NAME = sys.SYSOBJECTS.name)
WHERE major_id IN (SELECT ID FROM sys.SYSOBJECTS WHERE XTYPE='U') AND INFORMATION_SCHEMA.columns.TABLE_NAME is null

-- 提取适当的列
SELECT
INFORMATION_SCHEMA.columns.TABLE_CATALOG AS 数据库名,
sys.SYSOBJECTS.name AS 表名,
INFORMATION_SCHEMA.columns.COLUMN_NAME AS 列名,
INFORMATION_SCHEMA.columns.DATA_TYPE AS 数据类型,
INFORMATION_SCHEMA.columns.CHARACTER_MAXIMUM_LENGTH AS varchar长度,
sys.extended_properties.value AS 描述
FROM sys.extended_properties
LEFT JOIN sys.SYSOBJECTS ON sys.SYSOBJECTS.id = sys.extended_properties.major_id
LEFT JOIN INFORMATION_SCHEMA.columns ON (INFORMATION_SCHEMA.columns.ORDINAL_POSITION = sys.extended_properties.minor_id AND INFORMATION_SCHEMA.columns.TABLE_NAME = sys.SYSOBJECTS.name)
WHERE major_id IN (SELECT ID FROM sys.SYSOBJECTS WHERE XTYPE='U') AND INFORMATION_SCHEMA.columns.TABLE_NAME is null