CREATE DATABASE [CompaniesDB];
GO

USE [CompaniesDB];
GO

CREATE TABLE [Companies] (
    [CompanyId] int NOT NULL IDENTITY,
    [Name] nvarchar(max) NOT NULL,
    [ContractStatus] int NOT NULL CHECK ([ContractStatus] IN(0, 1, 2)),
	CONSTRAINT [PK_CompanyId] PRIMARY KEY ([CompanyId])
);
GO

CREATE TABLE [Users] (
    [UserId] int NOT NULL IDENTITY,
	[CompanyID] int NOT NULL,
    [Name] nvarchar(max) NOT NULL,
    [Login] nvarchar(max) NOT NULL,
    [Password] nvarchar(max) NOT NULL,
	CONSTRAINT [PK_UserId] PRIMARY KEY ([UserId]),
	CONSTRAINT [FK_Users_Companies] FOREIGN KEY (CompanyID) REFERENCES [Companies] (CompanyId) ON DELETE CASCADE
);
GO

INSERT INTO [Companies] (Name, ContractStatus) VALUES
('Defend Studio', '0'),
('Yandex Music', '1')
GO