CREATE TABLE qr_codes (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    target_url VARCHAR(500) NOT NULL,
    qr_code_url VARCHAR(500),
    scan_count INTEGER DEFAULT 0,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Indexes for performance
CREATE INDEX idx_qr_codes_created_at ON qr_codes(created_at);
CREATE INDEX idx_qr_codes_is_active ON qr_codes(is_active);
CREATE INDEX idx_qr_codes_target_url ON qr_codes(target_url);