In SQL databases, a primary key is important for uniquely identifying records in a table. However, sometimes it is not practical to manually assign unique values for each record, especially when ...

Imagine you're creating a contact form on a website. Every time someone submits it, their data gets saved in your database. But wait — how do you keep track of each entry? Manually assigning IDs?

ALTER TABLE `mc_catalog_product_img_content` AUTO_INCREMENT = 0; ALTER TABLE `mc_catalog_product_rel` AUTO_INCREMENT = 0; ALTER TABLE `mc_cms_page` AUTO_INCREMENT = 0; ALTER TABLE ...

ADD COLUMN IF NOT EXISTS variation_price_adjustment DECIMAL(10,2) DEFAULT 0 AFTER selected_variations, ADD COLUMN IF NOT EXISTS created_at DATETIME DEFAULT CURRENT_TIMESTAMP, ADD COLUMN IF NOT EXISTS ...