SQL, or Structured Query Language, is the query language used for managing data in databases, playing a fundamental role for many IT specialists. It allows for storing, processing, and sharing information in an organized and secure way. SQL enables quick data retrieval, filtering, modification, and access control, making it an indispensable tool in a world where data is rapidly growing.

This WebQuest will introduce you to SQL topics, showing you step by step how this language is used in the work of specialists. Learning SQL is not only about understanding the syntax but also about grasping the logic behind working with databases – a crucial skill for professions like data analyst, database administrator, programmer, or security consultant. Each group you divide into will cover one key SQL topic, giving you a broad understanding of SQL’s various applications and helping you acquire practical skills.

The Importance of SQL in the IT World and Everyday Life

SQL is one of the most popular languages in IT, used in large tech companies, smaller organizations, and government institutions alike. It would be difficult for online services, e-commerce platforms, banking systems, or customer relationship management (CRM) systems to function without SQL. It is used by business applications and social media, enabling quick and effective data processing, from sales transactions to user behavior analysis.

Mastering SQL not only allows you to process data but also secure it from unauthorized access, which is critical in the face of modern cybersecurity challenges and the protection of personal data.

The key topics you will explore in this

WebQuest include:

Basic SQL Syntax: Every database relies on queries, and the SELECT command is the primary tool for searching through them. With this command and others like WHERE (filtering), GROUP BY (grouping), and ORDER BY (sorting), an SQL user can quickly retrieve necessary information. Understanding these basic commands is the foundation of all further work with SQL.

Adding, Modifying, and Deleting Data: Databases are not just about storing data, but also dynamically updating it. Using INSERT, UPDATE, and DELETE commands, you can add new records, modify existing information, and delete obsolete or unnecessary data. These commands are crucial for administrators and developers working on applications where data must be regularly updated.

Table Relationships and Multi-table Queries: In large databases, information is stored in multiple tables, which can be linked. In SQL, you can join data from different tables using JOINs, creating complex queries that allow analysis of connected information. For example, you can join the “Customers” table with the “Orders” table to get a complete view of customer transactions. Table relationships are fundamental for organizing databases used for complex analysis.

Data Security and Basic SQL Security Measures (Group 4): In times when data is one of the most valuable assets for any organization, securing it is a top priority. SQL provides mechanisms for limiting access to data, setting permissions, and preventing threats such as SQL Injection. The ability to manage data access and secure it is critical for IT security specialists who must ensure the confidentiality and integrity of information.

Professional Context and Simulation of SQL Work

Proficiency in SQL is essential for many technical roles. Data analysis, database system administration, project management, and security consultations are just some of the fields where SQL plays a vital role. Each group will not only focus on theoretical learning but will also adopt professional roles to better understand how SQL is applied in real-world scenarios. This will help you not only grasp the technical aspects of SQL but also gain practical experience in its application.

Divide into 4 groups. Each group will develop topics related to SQL, preparing presentations, practical exercises, and role-playing simulations related to professions involving databases (e.g., data analyst, SQL programmer, database administrator, consultant). During the task, each group member will assume a specific professional role to better understand how SQL is used in real-world projects.

Group 1: Basic SQL Syntax

Task: Present the basic SQL syntax: SELECT, WHERE, GROUP BY, and ORDER BY commands. Prepare educational materials that explain step-by-step how to build simple queries to search and filter data.

Practical Exercise: Create queries that search and group data from an example database (e.g., a student database with grades and courses). Explain each step of using the commands so that students can replicate the process.

Professional Role: During the presentation, assume the role of data analysts preparing reports based on collected information.

Group 2: Adding, Modifying, and Deleting Data (INSERT, UPDATE, DELETE)

Task: Explain how SQL can be used to add new records to a table, modify existing data, and delete records. Present the risks and benefits associated with editing data directly in the database.

Practical Exercise: Use an employee table as an example to show how to add a new record, update existing employee information, and delete a record. Discuss potential errors and how to avoid them.

Professional Role: During the presentation, assume the role of database administrators responsible for managing employee data and ensuring its consistency and security.

Group 3: Table Relationships and Multi-table Queries (JOIN)

Task: Focus on table relationships and multi-table queries. Explain what relationships in databases are (e.g., one-to-one, one-to-many) and how to join data from different tables using different types of JOINs (INNER JOIN, LEFT JOIN, RIGHT JOIN).

Practical Exercise: Use a sample database containing customer and order data. Show how to retrieve full information about a customer's orders using JOINs. Explain the differences between the types of JOINs and the consequences of their use.

Professional Role: During the presentation, assume the role of SQL programmers collaborating with the sales department to create queries providing key information about customers and orders.

Group 4: Data Security and Basic SQL Security Measures

Task: Present basic data security concepts in SQL, such as access control to data, restricting access to sensitive information, and using permissions and roles.

Practical Exercise: Demonstrate how to configure basic table permissions so that users have different levels of access (e.g., the administrator has full access, but employees can only view data). Show how to prevent SQL Injection.

Professional Role: During the presentation, assume the role of data security consultants helping the company ensure the database’s safety and protect it from external threats.

Why will you work in groups?

Each group will present a different aspect of SQL, allowing you to explore the characteristics of various SQL applications. In SQL, every aspect of query building has its details and dependencies. Through group division, you will be able to delve deeper into the topic and examine different SQL functions.