sql server2008给数据表，字段，添加修改注释

柔光的暖阳◎ 2021-06-26 16:06 647阅读 0赞

-- 表加注释
    EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'注释内容' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'表名'

--例如：
    EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'系统设置表' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'CM01_SYSTEM'

--新增数据字段注释
     EXECUTE sp_addextendedproperty 'MS_Description', '收益浮动表', 'user', 'dbo', 'table', 'COM_IncomeFloat', 'column', 'RowId';
    
    --修改数据字段注释
    EXECUTE sp_updateextendedproperty 'MS_Description', '收益浮动表', 'user', 'dbo', 'table', 'COM_IncomeFloat', 'column', 'RowId';

*  `MS_Description` ：调用的`Proc`
 *  `COM_IncomeFloat` ：表名
 *  `RowId` ：表字段

## 查询字段注释 ##

SELECT
    A.name AS table_name,
    B.name AS column_name,
    C.value AS column_description
    FROM sys.tables A
    INNER JOIN sys.columns B ON B.object_id = A.object_id
    LEFT JOIN sys.extended_properties C ON C.major_id = B.object_id AND C.minor_id = B.column_id
    WHERE A.name = 'COM_IncomeFloat'

--------------------

## sql server 添加表注释、字段注释 ##

--为字段添加注释 
    --格式如右：execute sp_addextendedproperty 'MS_Description','字段备注信息','user','dbo','table','字段所属的表名','column','添加注释的字段名';
    execute sp_addextendedproperty 'MS_Description','add by liyc. 诊断类别码','user','dbo','table','DiagRecord','column','DiagTypeCode';
     
    --修改字段注释 
    execute sp_updateextendedproperty 'MS_Description','add by liyc.','user','dbo','table','DiagRecord','column','DiagTypeCode';
     
    --删除字段注释
    execute sp_dropextendedproperty 'MS_Description','user','dbo','table','DiagRecord','column','DiagTypeCode';
     
    -- 添加表注释
    execute sp_addextendedproperty 'MS_Description','诊断记录文件','user','dbo','table','DiagRecord',null,null;
     
    -- 修改表注释
    execute sp_updateextendedproperty 'MS_Description','诊断记录文件1','user','dbo','table','DiagRecord',null,null;
     
    -- 删除表注释
    execute sp_dropextendedproperty 'MS_Description','user','dbo','table','DiagRecord',null,null;
     
    -- 说明：
    -- 1.增加、修改、删除注释调用不同的存储过程 
    -- 2.增加、修改注释调用的存储过程参数数量和含义相同，删除备注比前两者少了一个“备注内容”的参数
    -- 3.为表添加注释相比于为字段添加注释，最后两个参数为null
     
    --查看表的注释
    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释 
    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

--------------------

## SqlServer如何给表添加新的字段以及字段注释 ##

**语法：**

USE 数据库名ALTER TABLE 表名 ADD 字段名 类型 默认值 是否为空;EXEC Sp_addextendedproperty 
      N'MS_Description', 
      N'注释内容', 
      N'SCHEMA', 
      N'dbo', 
      N'TABLE', 
      N'表名', 
      N'COLUMN', 
      N'字段名';

**事例：**

USE [gameagent] 
    
    ALTER TABLE [gameagent].[dbo].[charge_consume] 
      ADD card_consume INT DEFAULT(0) NOT NULL; 
    
    EXEC Sp_addextendedproperty 
      N'MS_Description', 
      N'房卡消耗', 
      N'SCHEMA', 
      N'dbo', 
      N'TABLE', 
      N'charge_consume', 
      N'COLUMN', 
      N'card_consume';

**注意：**  
建议设置值不为空，且要给默认值；

新加的字段在表中的位置似乎没法自定义。