Sql Server 添加、更新、查询表注释、字段注释相关sql

/*******************字段添加注释*********************/ 

if not exists (SELECT
C.value AS column_description
FROM sys.tables A
INNER JOIN sys.columns B ON B.object_id = A.object_id
INNER JOIN sys.extended_properties C ON C.major_id = B.object_id AND C.minor_id = B.column_id
WHERE A.name = N'表名' and B.name=N'字段名')
   EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'字段注释' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'表名', @level2type=N'COLUMN',@level2name=N'字段名'

EXEC sp_updateextendedproperty @name=N'MS_Description', @value=N'字段注释' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'表名', @level2type=N'COLUMN',@level2name=N'字段名'

/*******************表添加注释*********************/ 

if not exists (SELECT
A.name,
C.value
FROM sys.tables A
inner JOIN sys.extended_properties C ON C.major_id = A.object_id  and minor_id=0
WHERE A.name = N'表名')
EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'表注释' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'表名'

EXEC sp_updateextendedproperty @name=N'MS_Description', @value=N'表注释' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'表名'

/*******************查询注释相关sql***********************/
--查看表的注释
SELECT
A.name,
C.value
FROM sys.tables A
inner JOIN sys.extended_properties C ON C.major_id = A.object_id  and minor_id=0
WHERE A.name = N'表名'

--查看字段的注释
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 = N'luobo'