sql server 修改表字段

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_Description','字段说明内容',N'user',N'dbo',N'table',N'表名',N'column',N'字段名'
4。删除字段说明
EXEC sp_dropextendedproperty N'MS_Description', 'user','dbo', 'table', '表名', 'column','字段名'

增加字段添加字段说明例子
alter table dbo.pmw_order add AirCost type not null default 0
EXECUTE   sp_addextendedproperty   N'MS_Description','航空成本',N'user',N'dbo',N'table',N'pmw_order',N'column',N'AirCost'

ALTER TABLE kingdee_pro_stock ADD org_no VARCHAR(20);
EXECUTE sp_addextendedproperty N'MS_Description','销售组织',N'user',N'dbo',N'table',N'kingdee_pro_stock',N'column',N'org_no';