Question

假设我有一个像这样的结构表

CREATE TABLE Printout
(
  ID INT ,
  TypeID INT ,--TypeID references Type table
  PrintoutNumber INT
)

CREATE TABLE [Type] ( ID INT, Code NVARCHAR(5) )

和两个序列

CREATE SEQUENCE FirstSequence
START WITH 1
INCREMENT BY 1 ;

CREATE SEQUENCE SecondSequence
START WITH 1
INCREMENT BY 1 ;

我想要做的是在插入行之前通过调用NEXT VALUE FOR，根据Printout表中的TypeID值将序列添加为PrintoutNumber的默认值。

例如：

IF TypeID = 1 - ＆gt; PrintoutNumber = FirstSequence的下一个值
IF TypeID = 2 - ＆gt; PrintoutNumber =下一个值为SecondSequence

代码：

CASE 
   WHEN TypeID = 1 
      THEN NEXT VALUE FOR dbo.FirstSequence 
      ELSE NEXT VALUE FOR dbo.SecondSequence 
END AS PrinutoutNumber

可以使用哪种方法/方法来确定相同的结果？

感谢任何帮助

Answer 1

create procedure printout_insert
(
    @id int,
    @TypeId int
)
as
    declare @printNumber int;
    if @TypeId = 1 
    begin 
        set @printNumber = NEXT VALUE FOR dbo.FirstSequence;
    end;
    else if @TypeId = 2
    begin 
        set @printNumber = NEXT VALUE FOR dbo.SecondSequence;
    end;

    insert into printout
    (
        id,
        TypeId,
        PrintoutNumber
    )
    values
    (
        @id,
        @TypeId,
        @printNumber
    )

- 插入行

exec printout_insert 1,1
exec printout_insert 1,2
exec printout_insert 1,1
exec printout_insert 1,2
exec printout_insert 1,1
exec printout_insert 1,2
exec printout_insert 1,1
exec printout_insert 1,2
exec printout_insert 1,1
exec printout_insert 1,2
exec printout_insert 1,1
exec printout_insert 1,2
exec printout_insert 1,1

select * from printout order by typeid, PrintoutNumber

- 结果 1 1 1 1 1 2 1 1 3 1 1 4 1 1 5 1 1 6 1 1 7 1 2 1 1 2 2 1 2 3 1 2 4 1 2 5 1 2 6

如何根据SQL Server中的另一个状态列使用两个序列作为默认值

1 个答案: