Why does asp net membership have a users table and a membership table

Understanding ASP.NET Membership

ASP.NET Membership is a feature provided by the ASP.NET framework that allows developers to manage user authentication and authorization in web . It provides a set of classes and APIs that simplify the process of creating and managing user accounts, roles, and permissions.

When using ASP.NET Membership, you may have noticed that it includes two tables in the underlying database: the “Users” table and the “Membership” table. This article aims to the purpose of these tables and why they are necessary.

The Users Table

The “Users” table is responsible for storing information about the users registered in your application. It typically contains columns such as “,” “Email,” “Password,” and additional user-specific data. This table is essential for managing user accounts and allows you to perform operations such as creating new users, updating user information, and deleting users.

 TABLE Users (
    Username VARCHAR(50) NOT NULL,
    Email VARCHAR(100) NOT NULL,
    Password VARCHAR(100) NOT NULL,
    -- Additional user-specific columns

The Membership Table

The “Membership” table, on the other hand, is responsible for storing information related to user authentication and authorization. It includes columns such as “UserId,” “PasswordHash,” “PasswordSalt,” and other required for secure password and user validation.

When a user registers in your application, ASP.NET Membership automatically generates a unique “UserId” for them and stores their password securely by using hashing algorithms and salt . This table is crucial for validating user during the login process and managing password-related operations such as password reset or change.

CREATE TABLE Membership (
    PasswordHash VARCHAR(100) NOT NULL,
    PasswordSalt VARCHAR(50) NOT NULL,
    -- Additional membership-related columns

Relationship between the Tables

The “Users” table and the “Membership” table are related through the “UserId” column. This column serves as a foreign key in the “Membership” table, referencing the corresponding user in the “Users” table. This relationship allows you to retrieve membership-related information for a specific user by joining these tables based on the “UserId.”


In summary, the presence of both the “Users” table and the “Membership” table in ASP.NET Membership is necessary to separate user-specific information from membership-related data. The “Users” table stores general user details, the “Membership” table handles authentication and authorization-related information. Understanding this distinction is crucial for effectively managing user accounts and implementing secure authentication in your ASP.NET applications.

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