sql获取表字段名、描述和类型

SELECT TableName = OBJECT_NAME(c.object_id), ColumnsName = c.name, Description = ex.value, ColumnType=st.name, Length=c.max_length 
FROM 
sys.columns c 
LEFT JOIN 
sys.extended_properties ex 
ON 
ex.major_id = c.object_id 
AND ex.minor_id = c.column_id 
AND ex.name = ‘MS_Description‘ 
LEFT JOIN
systypes st 
on c.system_type_id=st.xtype 
WHERE 
OBJECTPROPERTY(c.object_id, ‘IsMsShipped‘)=0 
AND OBJECT_NAME(c.object_id) =‘tablename‘