SQL Server查询、添加、修改表和字段的备注描述

--SQL Server查询所有表的字段的备注说明

SELECT
TableName=CASE WHEN C.column_id=1 THEN O.name ELSE N'' END,
TableDesc=ISNULL(CASE WHEN C.column_id=1 THEN PTB.[value] END,N''),
Column_id=C.column_id,
ColumnName=C.name,
PrimaryKey=ISNULL(IDX.PrimaryKey,N''),
[IDENTITY]=CASE WHEN C.is_identity=1 THEN N'√'ELSE N'' END,
Computed=CASE WHEN C.is_computed=1 THEN N'√'ELSE N'' END,
Type=T.name,
Length=C.max_length,
Precision=C.precision,
Scale=C.scale,
NullAble=CASE WHEN C.is_nullable=1 THEN N'√'ELSE N'' END,
[Default]=ISNULL(D.definition,N''),
ColumnDesc=ISNULL(PFD.[value],N''),
IndexName=ISNULL(IDX.IndexName,N''),
IndexSort=ISNULL(IDX.Sort,N''),
Create_Date=O.Create_Date,
Modify_Date=O.Modify_date
FROM sys.columns C
INNER JOIN sys.objects O ON C.[object_id]=O.[object_id]
AND O.type='U' AND O.is_ms_shipped=0
INNER JOIN sys.types T ON C.user_type_id=T.user_type_id
LEFT JOIN sys.default_constraints D ON C.[object_id]=D.parent_object_id
AND C.column_id=D.parent_column_id AND C.default_object_id=D.[object_id]
LEFT JOIN sys.extended_properties PFD ON PFD.class=1
AND C.[object_id]=PFD.major_id AND C.column_id=PFD.minor_id
-- AND PFD.name='Caption' -- 字段说明对应的描述名称(一个字段可以添加多个不同name的描述)
LEFT JOIN sys.extended_properties PTB ON PTB.class=1
AND PTB.minor_id=0 AND C.[object_id]=PTB.major_id
-- AND PFD.name='Caption' -- 表说明对应的描述名称(一个表可以添加多个不同name的描述)
LEFT JOIN -- 索引及主键信息
(
SELECT
IDXC.[object_id],
IDXC.column_id,
Sort=CASE INDEXKEY_PROPERTY(IDXC.[object_id],IDXC.index_id,IDXC.index_column_id,'IsDescending')
WHEN 1 THEN 'DESC' WHEN 0 THEN 'ASC' ELSE '' END,
PrimaryKey=CASE WHEN IDX.is_primary_key=1 THEN N'√'ELSE N'' END,
IndexName=IDX.Name
FROM sys.indexes IDX
INNER JOIN sys.index_columns IDXC ON IDX.[object_id]=IDXC.[object_id]
AND IDX.index_id=IDXC.index_id
LEFT JOIN sys.key_constraints KC ON IDX.[object_id]=KC.[parent_object_id]
AND IDX.index_id=KC.unique_index_id
INNER JOIN -- 对于一个列包含多个索引的情况,只显示第1个索引信息
(
SELECT [object_id], Column_id, index_id=MIN(index_id)
FROM sys.index_columns
GROUP BY [object_id], Column_id
) IDXCUQ ON IDXC.[object_id]=IDXCUQ.[object_id]
AND IDXC.Column_id=IDXCUQ.Column_id AND IDXC.index_id=IDXCUQ.index_id
) IDX ON C.[object_id]=IDX.[object_id]
AND C.column_id=IDX.column_id
--WHERE O.name=N'tablename' -- 如果只查询指定表,加上此条件
ORDER BY O.name,C.column_id

--表添加描述
--exec sp_addextendedproperty N'MS_Description', N'表的描述', N'SCHEMA', N'dbo',N'table', N'表名';

--表修改描述
--exec sp_updateextendedproperty N'MS_Description', N'资产模板表', N'SCHEMA', N'dbo',N'table', N'ZiChanMoBan';

--字段添加和修改备注：
--新增：

--exec sp_addextendedproperty N'MS_Description', N'字段备注内容', N'SCHEMA', N'dbo',N'table', N'表名',N'column', N'字段名';
--修改：

--exec sp_updateextendedproperty N'MS_Description', N'字段备注内容', N'SCHEMA', N'dbo',N'table', N'表名',N'column', N'字段名';

--查指定表的字段描述

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 = '表名'