Lesson 1.2 – The Excel Interface: Ribbon, Tabs, Groups, and Formula Bar This lesson provides a clear and structured explanation of the Excel interface. Understanding the interface is essential before entering data or using formulas. Each component of the interface has a specific purpose, and learning how these elements work will allow you to navigate Excel efficiently and perform tasks with accuracy. 1. Overview of the Excel Interface When you open Excel, the screen is divided into several functional areas. Each area is designed to help you perform specific actions such as formatting data, inserting formulas, creating charts, or managing files. The main components are: Title Bar Ribbon Tabs Groups Formula Bar Worksheet Area (Grid) Status Bar The following sections describe each component in detail. 2. Title Bar The Title Bar is located at the top of the Excel window. It displays the name of the current workbook (...
Part II: Retrieving Data Chapter 3: Basic SELECT Queries Retrieving data is the core skill every SQL user must master. Whether you’re exploring a new dataset, debugging an application, or building reports, the SELECT statement is your primary tool. In this chapter, we’ll explore: The anatomy of a SELECT statement How to choose specific columns and rename them with aliases Filtering rows precisely with the WHERE clause Sorting results using ORDER BY Limiting output for faster testing with LIMIT and TOP By the end, you’ll have the confidence to write queries that fetch exactly the data you need—no more, no less. 1. Anatomy of the SELECT Statement Every SQL query starts with the SELECT clause, which defines what you want to see, and the FROM clause, which specifies where that data lives. A simple query looks like this: sql SELECT column1, column2 FROM table_name; Here’s the typical order of clauses in a SELECT statement: SELECT – List of columns or expressions to return. FRO...