SQL SERVER添加表注释、字段注释

--取表注释
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 = 't_dept';

--取视图注释

SELECT A.name AS table_name, B.name AS column_name, C.value AS column_description
FROM sys.views 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 = 'v_name';

select * from sys.extended_properties
where major_id=66815300

--为字段添加注释
--Eg. 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;

查询文档

SELECT
表名=case   when   a.colorder=1   then   d.name   else   ''   end,
表说明=case   when   a.colorder=1   then   isnull(f.value,'')   else   ''   end,
字段序号=a.colorder,
字段名=a.name,
标识=case   when   COLUMNPROPERTY(   a.id,a.name,'IsIdentity')=1   then   '√'else   ''   end,
主键=case   when   exists(SELECT   1   FROM   sysobjects   where   xtype='PK'   and   name   in   (
SELECT   name   FROM   sysindexes   WHERE   indid   in(
SELECT   indid   FROM   sysindexkeys   WHERE   id   =   a.id   AND   colid=a.colid
)))   then   '√'   else   ''   end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允许空=case   when   a.isnullable=1   then   '√'else   ''   end,
默认值=isnull(e.text,''),
字段说明=isnull(g.[value],'')
FROM   syscolumns   a
left   join   systypes   b   on   a.xusertype=b.xusertype
inner   join   sysobjects   d   on   a.id=d.id     and   d.xtype='U'   and     d.name<>'dtproperties'
left   join   syscomments   e   on   a.cdefault=e.id
left   join   sys.extended_properties   g   on   a.id=g.major_id   and   a.colid=g.minor_id
left   join   sys.extended_properties   f   on   d.id=f.major_id   and   f.minor_id=0
where   d.name='TableName'         --如果只查询指定表,加上此条件
order   by   a.id,a.colorder