vb.net - 计算列规范

Question

CREATE TABLE PaperTable
(
    PaperID int IDENTITY (1,1) NOT NULL
 , PageNumber varchar(100)
  , PaperAlphaID AS Cast(Right(Year(getDate()),2) as varchar(2)) +'-'+ PageNumber
);

当我添加“001”和“002”作为我的论文编号时得到的结果:

PaperID   PageNumber  PaperAlphaID
-------   ----------  ------------
  1         001          15-001
  2         002          15-002

但我想在 PaperAlphaID 中显示全年

PaperID   PageNumber  PaperAlphaID
-------   ----------  ------------
  1         001          2015-001
  2         002          2015-002

代替 15-001 和 15-002

Answer 1

删除 RIGHT 函数并更新 varchar(4)

CREATE TABLE PaperTable
(
   PaperID int IDENTITY (1,1) NOT NULL
   , PageNumber varchar(100)
   ,   PaperAlphaID AS Cast(Year(getDate())) as varchar(4)) +'-'+ PageNumber
);