What are some potential pitfalls of storing multiple user and group notifications in a PHP application?

One potential pitfall of storing multiple user and group notifications in a PHP application is the risk of data duplication and inefficiency. To solve this issue, it's important to normalize the database structure by creating separate tables for users, groups, and notifications, and establishing proper relationships between them. 

// Example of normalized database structure for storing user and group notifications

// Users table
CREATE TABLE users (
    id INT PRIMARY KEY,
    username VARCHAR(50)
);

// Groups table
CREATE TABLE groups (
    id INT PRIMARY KEY,
    group_name VARCHAR(50)
);

// Notifications table
CREATE TABLE notifications (
    id INT PRIMARY KEY,
    user_id INT,
    group_id INT,
    message TEXT,
    created_at TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id),
    FOREIGN KEY (group_id) REFERENCES groups(id)
);

Keywords

scalability database normalization performance caching error handling

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