Puedes hacer esto.
--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
