How to create sequence in SQL Server 2008

Question

I am creating sequence in SQL Server with the following code. But it displays error as unknown object type. Please give a solution

Here\'s my code :

Answer 1

We can't use Sequence easily in SQL Server 2008.

You can use CTE(Common Table Expressions) for Sequence Generation in SQL Server 2008

WITH NUM_GEN (n) AS
     ( 
            SELECT 1 
            UNION 
                  ALLSELECT n+1 
            FROM  NUM_GEN 
            WHERE n+1< MAX_VALUE 
     ) 
SELECT n 
FROM   NUM_GEN

Answer 2

Create a Numbers table; here's a SO question on the subject. Let's call it dbo.Number.

Have a table with an identity column. Set the seed and step to whatever is appropriate:

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

Then insert values from the numbers table and capture the newly-generated identity values:

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;

Be sure to DELETE .. dbo.SequenceGenerator from time to time, else it will get big for no additional value. Do not TRUNCATE it - that will reset the IDENTITY column to its initally-declared seed value.

Answer 3

Are you sure you're running 2012? I had no trouble with:

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

Your 0,0 values generated a syntax error for me but a clear and simple one.

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

Answer 4

SQL Server 2008 can't create sequences, Sequence objects apply to SQL Server 2012 through current versions.

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

You can use an IDENTITY in your table instead, for example:

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

The starting value for IDENTITY is 1, and it will increment by 1 for each new record.

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

Answer 5

You can do this.

--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

Answer 6

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