NEWID (Transact-SQL)

NEWID (Transact-SQL)


THIS TOPIC APPLIES TO: yesSQL Server noAzure SQL Database noAzure SQL Data Warehouse noParallel Data Warehouse

Creates a unique value of type uniqueidentifier.

Topic link icon Transact-SQL Syntax Conventions



NEWID() is compliant with RFC4122.

The following example uses NEWID() to assign a value to a variable declared as the uniqueidentifier data type. The value of the uniqueidentifier data type variable is printed before the value is tested.

-- Creating a local variable with DECLARE/SET syntax.
DECLARE @myid uniqueidentifier
SET @myid = NEWID()
PRINT 'Value of @myid is: '+ CONVERT(varchar(255), @myid)

Here is the result set.

Value of @myid is: 6F9619FF-8B86-D011-B42D-00C04FC964FF

The value returned by NEWID is different for each computer. This number is shown only for illustration.

The following example creates the cust table with a uniqueidentifier data type, and uses NEWID to fill the table with a default value. In assigning the default value of NEWID(), each new and existing row has a unique value for the CustomerID column.

-- Creating a table using NEWID for uniqueidentifier data type.
 CustomerID uniqueidentifier NOT NULL
   DEFAULT newid(),
 Company varchar(30) NOT NULL,
 ContactName varchar(60) NOT NULL, 
 Address varchar(30) NOT NULL, 
 City varchar(30) NOT NULL,
 StateProvince varchar(10) NULL,
 PostalCode varchar(10) NOT NULL, 
 CountryRegion varchar(20) NOT NULL, 
 Telephone varchar(15) NOT NULL,
 Fax varchar(15) NULL
-- Inserting 5 rows into cust table.
(CustomerID, Company, ContactName, Address, City, StateProvince, 
 PostalCode, CountryRegion, Telephone, Fax)
 (NEWID(), 'Wartian Herkku', 'Pirkko Koskitalo', 'Torikatu 38', 'Oulu', NULL,
 '90110', 'Finland', '981-443655', '981-443655')
,(NEWID(), 'Wellington Importadora', 'Paula Parente', 'Rua do Mercado, 12', 'Resende', 'SP',
 '08737-363', 'Brasil', '(14) 555-8122', '')
,(NEWID(), 'Cactus Comidas para Ilevar', 'Patricio Simpson', 'Cerrito 333', 'Buenos Aires', NULL, 
 '1010', 'Argentina', '(1) 135-5555', '(1) 135-4892')
,(NEWID(), 'Ernst Handel', 'Roland Mendel', 'Kirchgasse 6', 'Graz', NULL,
 '8010', 'Austria', '7675-3425', '7675-3426')
,(NEWID(), 'Maison Dewey', 'Catherine Dewey', 'Rue Joseph-Bens 532', 'Bruxelles', NULL,
 'B-1180', 'Belgium', '(02) 201 24 67', '(02) 201 24 68');

The following example declares a local variable called @myid as a variable of uniqueidentifier data type. Then, the variable is assigned a value by using the SET statement.

DECLARE @myid uniqueidentifier ;
SET @myid = 'A972C577-DFB0-064E-1189-0154C99310DAAC12';
SELECT @myid;

Community Additions

© 2016 Microsoft