sql - 带有自动生成字符的 SQL 标识

Question

我有下表：使用 SQL Server

create table PoojaDetails
(
    PoojaDetailsID int identity constraint pk_PoojaDetailsID Primary Key, 
    ReceiptNo AS 'PB' + '/' + datepart(yy,getdate()) + '/' + RIGHT('000000' + CAST(PoojaDetailsID AS VARCHAR(10)), 6) PERSISTED,
    ReceiptDate datetime not null constraint df_ReceiptDate default getdate(),
    FirstName varchar(100) not null,
    LastName varchar(100) not null,
    TelNo bigint
)

当我执行查询时：表 'PoojaDetails' 中的计算列 'ReceiptNo' 无法持久化，因为该列是不确定的。

我想将 ReceiptNo 设为：PB/year/no 例如；PB/13/213433

有任何想法吗？？？谢谢你的时间

Answer 1

如果您可以依赖ReceiptDate始终由其默认约束填充并且永不更改，那么您可以使用它而不是getdate()在计算列中：

create table PoojaDetails
(
    PoojaDetailsID int identity constraint pk_PoojaDetailsID Primary Key, 
    ReceiptNo AS 'PB' + '/' + CONVERT(varchar(5),datepart(yy,ReceiptDate)) + '/' + RIGHT('000000' + CAST(PoojaDetailsID AS VARCHAR(10)), 6) PERSISTED,
    ReceiptDate datetime not null constraint df_ReceiptDate default getdate(),
    FirstName varchar(100) not null,
    LastName varchar(100) not null,
    TelNo bigint
)

Answer 2

请试一试，

create table PoojaDetails
(
    PoojaDetailsID int identity constraint pk_PoojaDetailsID  Primary Key, 
    ReceiptNo  AS 'PB' + '/' + cast(datepart(yy,getdate()) as varchar(25)) + '/' + RIGHT('000000' + CAST(PoojaDetailsID AS VARCHAR(10)), 6) ,
    ReceiptDate datetime not null constraint df_ReceiptDate default getdate(),
    FirstName varchar(100) not null,
    LastName varchar(100) not null,
    TelNo bigint
)