Big Data and AI

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Module 7 – Final Project: Sales Dashboard

Module 7 – Final Project: Sales Dashboard Welcome to Module 7 – Final Project of the Excel Basic International Course. This is the final step of your learning journey, where you will apply everything you have learned across the previous six modules to build a complete, professional Sales Dashboard . This module simulates a real business scenario and will help you develop practical skills used in companies worldwide. You will work with real data, apply formulas, create visualizations, and design a clean and functional dashboard ready for presentation. What You Will Build By the end of this module, you will have created a fully functional Sales Dashboard that includes: A clean and structured data table Essential formulas and calculated fields Professional conditional formatting Multiple charts (column, line, pie) A clear KPI summary section A polished dashboard layout ready for reporting This project is designed to be practica...

Lesson 6.5 – Best Practices for Clean Spreadsheets

Lesson 6.5 – Best Practices for Clean Spreadsheets Clean spreadsheets are easier to read, easier to maintain, and far less likely to contain errors. Whether you are preparing a report, building a dashboard, or sharing data with colleagues, following best practices ensures your work looks professional and functions reliably. In this lesson, you will learn the essential rules for creating clean, organized, and error‑free spreadsheets. 1. Why Clean Spreadsheets Matter A clean spreadsheet: Reduces mistakes and inconsistencies Makes formulas easier to understand Improves collaboration with colleagues Helps you analyze data more effectively Looks professional and trustworthy Clean structure is the foundation of every good Excel file. 2. Use Clear and Consistent Headers Headers should be descriptive, short, and consistent. Avoid vague labels like “Info” or “Data”. Good examples: Product Name Order Date Total Sales Custo...

Part IV: Modifying Data Chapter 10: Updating and Deleting

Chapter 10: Updating and Deleting Maintaining data integrity while modifying existing records is a core responsibility for any database professional. In this chapter, we’ll explore how to: Craft safe UPDATE statements with precise WHERE filters Delete data responsibly using DELETE and TRUNCATE Control transactions with COMMIT, ROLLBACK, and SAVEPOINT Leverage backups and test environments to prevent data loss Mastering these techniques ensures your production workflows are reliable, reversible, and free from unexpected data corruption. 1. Why Safe Data Modification Matters Uncontrolled UPDATEs or DELETEs can irreversibly alter or remove critical business information. Key risks include: Accidentally updating all rows by omitting a WHERE clause Deleting entire tables instead of targeted records Leaving partial changes due to interrupted operations Violating referential integrity and breaking application logic By applying rigorous safeguards—filters, transactions, and testing—you pr...

Lesson 6.4 – Data Validation (Dropdown Lists)

Lesson 6.4 – Data Validation (Dropdown Lists) Data Validation is one of the most important tools for controlling data entry in Excel. It helps you prevent mistakes, standardize inputs, and guide users to enter only valid values. One of the most common uses of Data Validation is creating dropdown lists , which allow users to select predefined options instead of typing manually. 1. Why Data Validation Matters Data Validation improves the accuracy and consistency of your spreadsheets. It helps you: Prevent typing errors Ensure consistent categories (e.g., “Paid”, “Pending”, “Cancelled”) Control numeric ranges (e.g., values between 1 and 100) Restrict dates to specific periods Create professional, user‑friendly forms It is essential for business reports, forms, surveys, inventory sheets, and dashboards. 2. Where to Find Data Validation Menu path: Data → Data Validation This opens the Data Validation dialog box, where you can choose ...

Lesson 6.3 – Find and Replace / Go To Special

Lesson 6.3 – Find and Replace / Go To Special Excel provides powerful tools to help you locate, modify, and select specific data quickly. Find and Replace allows you to search for text, numbers, formats, or formulas and replace them instantly. Go To Special helps you select specific types of cells, such as blanks, formulas, errors, constants, and more. These tools are essential for data cleaning, auditing, and fast navigation. 1. Why These Tools Matter When working with large datasets, manually searching for values or selecting specific cells is slow and error‑prone. These tools help you: Quickly locate specific values or text Replace repeated errors or outdated information Find and fix formatting inconsistencies Select only the cells you need (e.g., blanks, formulas, errors) Audit spreadsheets more efficiently They are essential for professional data cleaning and quality control. 2. Find (Search for Values) Where to find it: ...