SQL表：主键ID无法自动递增

Question

I automatically generated this file with Visual Studio:

CREATE TABLE [dbo].[Users] 
(
    [Id]                     INT           NOT NULL,
    [name]                   VARCHAR (50)  NOT NULL,
    [surname]                VARCHAR (50)  NOT NULL,
    [dni]                    VARCHAR (50)  NOT NULL,
    [phone]                  VARCHAR (50)  NOT NULL,
    [gender]                 BIT           NOT NULL,
    [email]                  VARCHAR (50)  NOT NULL,
    [inscriptionDate]        VARCHAR (50)  NOT NULL,
    [address]                VARCHAR (50)  NOT NULL,
    [postalCode]             VARCHAR (50)  NOT NULL,
    [city]                   VARCHAR (50)  NOT NULL,
    [province]               VARCHAR (50)  NOT NULL,
    [photo]                  IMAGE         NULL,
    [medicalHistory]         VARCHAR (MAX) NULL,
    [preferredMedicalCenter] VARCHAR (50)  NULL,
    [contactPersonName]      VARCHAR (50)  NOT NULL,
    [contactPersonPhone]     VARCHAR (50)  NOT NULL,

    PRIMARY KEY CLUSTERED ([Id] ASC)
);

However the primary key ID is not auto-incremented, while I thought it will do it.

Any hint?

Answer 1

Just auto increment the [Id] field with IDENTITY(1,1) :

 CREATE TABLE [dbo].[Users] (
        [Id]                     INT           IDENTITY(1,1) NOT NULL,
        [name]                   VARCHAR (50)  NOT NULL,
        [surname]                VARCHAR (50)  NOT NULL,
        [dni]                    VARCHAR (50)  NOT NULL,
        [phone]                  VARCHAR (50)  NOT NULL,
        [gender]                 BIT           NOT NULL,
        [email]                  VARCHAR (50)  NOT NULL,
        [inscriptionDate]        VARCHAR (50)  NOT NULL,
        [address]                VARCHAR (50)  NOT NULL,
        [postalCode]             VARCHAR (50)  NOT NULL,
        [city]                   VARCHAR (50)  NOT NULL,
        [province]               VARCHAR (50)  NOT NULL,
        [photo]                  IMAGE         NULL,
        [medicalHistory]         VARCHAR (MAX) NULL,
        [preferredMedicalCenter] VARCHAR (50)  NULL,
        [contactPersonName]      VARCHAR (50)  NOT NULL,
        [contactPersonPhone]     VARCHAR (50)  NOT NULL,
        PRIMARY KEY CLUSTERED ([Id] ASC)
    );