sql server 添加表注釋、字段注釋

--為字段添加注釋 
--格式如右：execute sp_addextendedproperty 'MS_Description','字段備注信息','user','dbo','table','字段所屬的表名','column','添加注釋的字段名';
execute sp_addextendedproperty 'MS_Description','add by liyc. 診斷類別碼','user','dbo','table','DiagRecord','column','DiagTypeCode';
 
--修改字段注釋 
execute sp_updateextendedproperty 'MS_Description','add by liyc.','user','dbo','table','DiagRecord','column','DiagTypeCode';
 
--刪除字段注釋
execute sp_dropextendedproperty 'MS_Description','user','dbo','table','DiagRecord','column','DiagTypeCode';
 
-- 添加表注釋
execute sp_addextendedproperty 'MS_Description','診斷記錄文件','user','dbo','table','DiagRecord',null,null;
 
-- 修改表注釋
execute sp_updateextendedproperty 'MS_Description','診斷記錄文件1','user','dbo','table','DiagRecord',null,null;
 
-- 刪除表注釋
execute sp_dropextendedproperty 'MS_Description','user','dbo','table','DiagRecord',null,null;
 
-- 說明：
-- 1.增加、修改、刪除注釋調用不同的存儲過程  
-- 2.增加、修改注釋調用的存儲過程參數數量和含義相同，刪除備注比前兩者少了一個“備注內容”的參數
-- 3.為表添加注釋相比於為字段添加注釋，最后兩個參數為null
 
 --查看表的注釋
 select isnull(value,'') from sys.extended_properties ex_p where ex_p.minor_id=0
and ex_p.major_id in (select id from sys.sysobjects a where a.name='表名')
 
 
 
 
--查看表的所有字段注釋
SELECT [ColumnName] = [Columns].name ,
        [Description] = [Properties].value,
        [SystemTypeName] = [Types].name ,
        [Precision] = [Columns].precision ,
        [Scale] = [Columns].scale ,
        [MaxLength] = [Columns].max_length ,
        [IsNullable] = [Columns].is_nullable ,
        [IsRowGUIDCol] = [Columns].is_rowguidcol ,
        [IsIdentity] = [Columns].is_identity ,
        [IsComputed] = [Columns].is_computed ,
        [IsXmlDocument] = [Columns].is_xml_document 
FROM sys.tables AS [Tables]
        INNER JOIN sys.columns AS [Columns] ON [Tables].object_id = [Columns].object_id
        INNER JOIN sys.types AS [Types] ON [Columns].system_type_id = [Types].system_type_id
                                           AND is_user_defined = 0
                                           AND [Types].name <> 'sysname'
        LEFT OUTER JOIN sys.extended_properties AS [Properties] ON [Properties].major_id = [Tables].object_id
                                                              AND [Properties].minor_id = [Columns].column_id
                                                              AND [Properties].name = 'MS_Description'
WHERE [Tables].name ='表名' -- and [Columns].name = '字段名'
ORDER BY [Columns].column_id