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  1. Rounding Averages in PostgreSQL, SQL, and Ruby
    PostgreSQL:Using the round() function:SELECT round(avg(column_name), 2) AS rounded_average FROM your_table; round(avg(column_name), 2) rounds the average of the column_name to 2 decimal places
  2. Understanding SQLite3::BusyException in Ruby on Rails
    Several common scenarios can lead to this exception:Multiple Rails Processes: If your application is running multiple instances (e.g., in a production environment), they might try to access and modify the database concurrently
  3. Troubleshooting Ruby on Rails Database Connection Error: PG::ConnectionBad
    PG::ConnectionBad: This indicates an issue with establishing a connection to the PostgreSQL database server from your Ruby on Rails application
  4. Understanding Rails Database Management: migrate, reset, and schema:load
    A popular web development framework built on top of Ruby that streamlines the process of creating database-backed web applications
  5. `destroy_all` vs. `delete_all` in Ruby on Rails: Understanding Database Deletion
    destroy_all:Behavior:Iterates over each record matching the conditions (if provided).For each record, it calls the model's destroy method
  6. Ruby Gems and Development Libraries: A Guide to Successful Installations
    gem install: This command is used in Ruby to install gems (packages) that provide additional functionalities.Failed to build gem native extension: The error indicates that the gem you're trying to install (likely a gem that interacts with MySQL) requires compiling native code extensions for performance reasons
  7. Resolving Ruby Library Installation Issues: The Case of sqlite3-ruby on Ubuntu
    Ruby: A popular programming language known for its simplicity and readability. It's often used for web development, data analysis
  8. Connecting Ruby to PostgreSQL: Installing the pg Gem on Ubuntu
    Understanding the Components:Ruby: A versatile programming language often used for web development. It provides a way to write code that interacts with databases and other systems
  9. Managing Database Schema Changes: Dropping Columns with Rails Migrations
    Concepts involved:Ruby on Rails (Rails): A web development framework that simplifies building database-backed web applications
  10. Eager Loading vs. Join Queries in Ruby on Rails: Understanding `includes` and `joins`
    Fetches data from all related tables in a single query.This is efficient when you need to access data from the associated tables for most or all of the results