Set start value for column with autoincrement

I have a table Orders with the following fields:

Id | SubTotal | Tax | Shipping | DateCreated

The Id column is set to autoincrement(1,1).

This is to be used in an E-commerce storefront. Sometimes a current E-commerce store is migrated to my platform and they already have orders - which could mean that their current Order.Id is, for example, 9586.

I want to have the autoincrement field start from that value.

How can I do this?

Solution 1:

From Resetting SQL Server Identity Columns:

Retrieving the identity for the table Employees:

DBCC checkident ('Employees')

Repairing the identity seed (if for some reason the database is inserting duplicate identities):

DBCC checkident ('Employees', reseed)

Changing the identity seed for the table Employees to 1000:

DBCC checkident ('Employees', reseed, 1000)

The next row inserted will begin at 1001.

Solution 2:

You need to set the Identity seed to that value:

CREATE TABLE orders
(
 id int IDENTITY(9586,1)
)

To alter an existing table:

ALTER TABLE orders ALTER COLUMN Id INT IDENTITY (9586, 1);

More info on CREATE TABLE (Transact-SQL) IDENTITY (Property)