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:root selector vs html selector in CSS

Both :root and html are selectors used in CSS to target the root element of your document, which in HTML is the <html> tag. Here's a breakdown of their similarities and differences: Similarities: In the context of HTML, both :root and html target the same element, the <html> tag. They can be used to set global styles that apply to the entire document. Differences: Specificity: :root has a higher specificity than html. This means if you use both selectors with conflicting styles, the style defined with :root will take precedence. This can be useful for overriding default styles or styles set with html. Document type: :root is a pseudo-class selector, meaning it works across different document types like SVG. html is an element selector and only works for HTML documents. So, if you're styling something other than HTML, :root is the way to go. Variable declaration: :root is commonly used to declare CSS custom properties (variables) that can be reused throughout your
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Database Schema

 A database schema is the blueprint or structure of a database, defining how data is organized and related. Components of database schema: 1. Tables (or relations):   Define the structure of data storage.     - Each table represents a single entity or concept (e.g., customers, orders, products).     - Tables consist of rows (or tuples) and columns (or attributes). 2. Columns (or attributes):   Define the individual elements within a table.     - Each column represents a single field or property (e.g., customer name, order date, product price).     - Columns have data types (e.g., integer, string, date) and may have constraints (e.g., primary key, foreign key). 3. Data types:  Specify the type of data stored in each column.     - Common data types include integers, strings, dates, timestamps, and Boolean values. 4. Relationships:   Define how tables are connected.     - One-to-one (1:1): One row in Table A matches one row in Table B.     - One-to-many (1:M): One row in Table A matches m
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