sqlserver查询数据库所有字段和表的关系

项目中常常会遇到查询每个字段在那些表中用，尤其是对新人来接收老项目，项目资料不全会害死人。

以下是查询字段和表的映射关系的sql

SELECT
c.[name] AS 字段名,
t.[name] AS 表名,
cast(ep.[value] as nvarchar(200)) AS [字段说明] 
FROM sys.tables AS t 
INNER JOIN sys.columns 
AS c ON t.object_id = c.object_id 
LEFT JOIN sys.extended_properties AS ep 
ON ep.major_id = c.object_id AND ep.minor_id = c.column_id