1.添加表说明 EXECUTE sp_addextendedproperty N'MS_Description','表说明',N'user',N'dbo',N'table',N'表名',NULL,NULL 2.删除表说明 EXEC sp_dropextendedproperty N'MS_Description','user','dbo','table', '表名', NULL,NULL 3.添加字段说明 EXECUTE sp_addextendedproperty N'MS_Descripti