NVARCHAR字段插入中文后显示"???"
插入语句:
insert into qualitys (lu,ru,ld,rd,s_time,o_doctorunit,o_doctor,o_sick,o_producttype,o_mainstuff,o_no) values ('','','6','','2012-03-18','惠爱口腔','田医生','曹光辉','钴铬金属冠','','JC005779')
USE [dental_web]GO/****** 对象: Table [dbo].[qualitys] 脚本日期: 04/04/2012 14:09:25 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOSET ANSI_PADDING ONGOCREATE TABLE [dbo].[qualitys]( [upldate] [datetime] NULL CONSTRAINT [DF_qualitys_upldate] DEFAULT (getdate()), [lu] [varchar](20) COLLATE Chinese_PRC_CI_AS NULL, [ru] [varchar](20) COLLATE Chinese_PRC_CI_AS NULL, [ld] [varchar](20) COLLATE Chinese_PRC_CI_AS NULL, [rd] [varchar](20) COLLATE Chinese_PRC_CI_AS NULL, [s_time] [datetime] NULL, [o_doctorunit] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL, [o_doctor] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL, [o_sick] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL, [o_producttype] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL, [o_mainstuff] [nvarchar](200) COLLATE Chinese_PRC_CI_AS NULL, [o_no] [varchar](20) COLLATE Chinese_PRC_CI_AS NULL) ON [PRIMARY]GOSET ANSI_PADDING OFF