how to create the table column in sql code example

Example 1: sql server add column

ALTER TABLE dbo.doc_exa ADD column_b VARCHAR(20) NULL, column_c INT NULL ;

Example 2: sql table

CREATE TABLE utilisateur
(
    id INT PRIMARY KEY NOT NULL,
    nom VARCHAR(100),
    prenom VARCHAR(100),
    email VARCHAR(255),
    date_naissance DATE,
    pays VARCHAR(255),
    ville VARCHAR(255),
    code_postal VARCHAR(5),
    nombre_achat INT
)

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