如何创建SQL Server 2008中

Question

我创建与下面的代码的SQL Server序列序列。但它将错误显示为未知的对象类型。请给一个解决方案

这里是我的代码：

create sequence seqval start with 100 increment by 1 minvalue 0 maxvalue 0 no cycle 
no cache; 

在此先感谢

Answer 1

你确定你正在运行的2012？我没有遇到任何问题：

CREATE SEQUENCE seqval 
START WITH 100 
INCREMENT BY 1 
minvalue 100 maxvalue 10000 NO CYCLE 

您的0,0值为我生成了一个语法错误，但是一个清晰而简单的错误。

The minimum value for sequence object 'seqval' must be less than its maximum value. 

Answer 2

创建一个Numbers表;这里有关于这个问题的SO问题。我们称之为dbo.Number。

有一个标识列的表。将种子和步骤，无论是适当的：

create table dbo.SequenceGenerator(ID int identity(1, 1), dummy int); 

然后插入从数表中的值，并捕获新生成的标识值：

declare @HowMany int = 3; -- This determines how large a sequence you receive 
          -- at each itteration 
declare @NewSequenceValue table (ID int); 

insert dbo.SequenceGenerator(dummy) 
output INSERTED.ID 
    into @NewSequenceValue 
select Number from dbo.Numbers 
where Number <= @HowMany; 

select * from @NewSequenceValue; 

一定要DELETE .. dbo.SequenceGenerator不时，否则它会变大，没有额外的价值。不要TRUNCATE它 - 这会将IDENTITY列重置为其初始声明的种子值。

Answer 3

WITH N0 as (SELECT 1 as n UNION ALL SELECT 1) 
,N1 as (SELECT 1 as n FROM N0 t1, N0 t2) 
,N2 as (SELECT 1 as n FROM N1 t1, N1 t2) 
,N3 as (SELECT 1 as n FROM N2 t1, N2 t2) 
,nums as (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT 1)) as num FROM N3) 
SELECT * FROM nums 

Answer 4

SQL Server 2008中不能创建序列，序列对象通过当前版本适用于SQL Server 2012。

https://msdn.microsoft.com/es-es/library/ff878091(v=sql.120).aspx

您可以在表中使用的身份，而不是，例如：

CREATE TABLE Person(
    Id int IDENTITY(1,1) NOT NULL PRIMARY KEY, 
    Name varchar(255) NOT NULL 
); 

身份的初始值为1，它会以1为每条新纪录递增。

http://www.w3schools.com/sql/sql_autoincrement.asp

Answer 5

您可以这样做。

--Create a dummy TABLE to generate a SEQUENCE. No actual records will be stored. 
CREATE TABLE SequenceTABLE 
(
    ID BIGINT IDENTITY 
); 
GO 

--This procedure is for convenience in retrieving a sequence. 
CREATE PROCEDURE dbo.GetSEQUENCE (@value BIGINT OUTPUT) 
AS 
    --Act like we are INSERTing a row to increment the IDENTITY 
    BEGIN TRANSACTION; 
    INSERT SequenceTABLE WITH (TABLOCKX) DEFAULT VALUES; 
    ROLLBACK TRANSACTION; 
    --Return the latest IDENTITY value. 
    SELECT @value = SCOPE_IDENTITY(); 
GO 

--Example execution 
DECLARE @value BIGINT; 
EXECUTE dbo.GetSEQUENCE @value OUTPUT; 
SELECT @value AS [@value]; 
GO