?? Day 3: Mastering SQL ??
Today was all about mastering some essential SQL commands: STATUS, SHOW, USE, CREATE DATABASE, and DROP DATABASE. Here’s a breakdown of what was covered, complete with use cases and examples:
?? STATUS:
The STATUS command provides information about the current database connection and server status. It’s invaluable for quick diagnostics and ensuring everything is running smoothly.
Example:
STATUS;
?? SHOW:
The SHOW command displays various pieces of database information, such as tables, databases, and server status. It’s a great way to get an overview of the database structure and configuration.
Example:
SHOW DATABASES;
SHOW TABLES;
?? USE:
The USE command selects a specific database to work with, allowing for targeted queries and operations within that database.
Example:
USE my_database;
?? CREATE DATABASE:
The CREATE DATABASE command creates a new database. Using IF NOT EXISTS ensures the command doesn’t fail if the database already exists, providing a safe way to create databases without errors.
Example:
CREATE DATABASE IF NOT EXISTS my_database;
?? DROP DATABASE:
The DROP DATABASE command deletes an existing database. Using IF EXISTS prevents errors by ensuring the command only executes if the database exists, making it safer to use in scripts and automated processes.
Example:
DROP DATABASE IF EXISTS my_database;
Understanding these commands and their use cases is crucial for efficient database management. Excited to continue building on this knowledge in the coming days!