SQL Guide

For each task, replace or update the existing SQL code in the top pane (main.sql) with your answer to the task and run it to see the results in the bottom pane (SQL Viewer).

Step 1: Complex Data Manipulation

To review the concepts covered in this step, please refer to the module Subqueries and Sets in the course Introduction to SQL.

In this step, you will practice writing complex queries that update, delete, and insert data based on specific conditions, often requiring subqueries. These operations are common in real-world database management, where multiple tables are related and queries must target specific data subsets.

Step 2: Advanced Data Management Using DML, DDL, and DCL

In this step, you will explore the core SQL commands that allow you to manage the structure and data within a database. You’ll learn the differences between Data Manipulation Language (DML), Data Definition Language (DDL), and Data Control Language (DCL), and how each one plays a critical role in database management. You will also practice applying constraints, managing relationships, and controlling access to the database. This step is vital for understanding the foundational management capabilities of SQL beyond just data retrieval.

Step 3: Advanced Data Manipulation and Integrity

In this step, you will apply advanced SQL techniques to manipulate data while ensuring integrity through the use of transactions and indexes. You’ll learn how to combine different SQL operations to manage complex datasets effectively, optimize queries for performance, and safeguard data consistency when performing multiple operations. This step will deepen your understanding of how to handle real-world data scenarios involving multiple tables, large datasets, and performance considerations. You'll finish this step with the ability to manage data updates, deletions, and retrievals while maintaining optimal database performance.