Unlocking the World of Business Intelligence with SQLBI

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Introduction : ·         In the current data-centric world, Business Intelligence (BI) is integral to transforming raw data into actionable insights, guiding organizations toward informed decision-making.  ·         Among the prominent educational platforms for mastering BI,  SQLBI  stands out for its focus on Microsoft technologies like Power BI, DAX (Data Analysis Expressions), and SSAS Tabular.  ·         This guide delves deep into how SQLBI can serve as an invaluable educational resource, helping both educators and learners build practical and theoretical knowledge of BI. What is SQLBI? ·         SQLBI is an educational platform dedicated to the study and application of Business Intelligence, particularly focused on Microsoft technologies. ·         Founded by renowned experts M...
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Disk Operating System

  • Introduction to Disk Operating System:
    • DOS, or Disk Operating System, is one of the earliest operating systems used for personal computers.
    • It was developed to manage files, run programs, and control hardware like disks and printers using simple text commands.
    • Unlike modern operating systems with graphical interfaces (like Windows or macOS), DOS relies on typing instructions into a command-line interface.
  • Key Features of DOS:
    • Command-Line Interface (CLI): DOS operates through text commands entered by the user, which control file management, program execution, and system settings.
    • Single-Tasking: DOS can only run one program at a time.
    • File System: DOS uses the FAT (File Allocation Table) file system for organizing and managing files on disk drives.
    • Memory Management: DOS operates in the real mode of the CPU, typically accessing up to 640 KB of memory directly.
  • Loading DOS:
    • When you start a computer that uses DOS, the operating system gets loaded from the disk (floppy or hard disk) into the computer's memory. 
    • This process is called booting. Here’s a simple breakdown of how DOS loads:
      • Power on the Computer: You turn on the computer, and it begins the boot process.
      • BIOS (Basic Input/Output System) Loads: The BIOS checks the computer’s hardware and looks for the operating system.
      • Loading DOS: If DOS is installed, the BIOS finds DOS on the disk and loads it into the computer’s memory.
      • System Prompt Appears: Once DOS is loaded, it’s ready to accept commands from the user.
  • System Prompt in DOS:
    • The system prompt (in DOS or the Command Prompt in modern operating systems) is used to perform various tasks by entering text-based commands. 
    • It allows users to manage files, run programs, configure the system, and troubleshoot issues directly through typed instructions.
    • Opening System Prompt in Modern Operating Systems (like Windows)
      • Opening the System Prompt (also known as Command Prompt) in modern operating systems like Windows is straightforward. 
      • Here's a step-by-step guide along with a description of each step:
    • Steps to Open Command Prompt in Windows
      • Step 1: Open the Start Menu:
        • Click on the Start Menu (Windows logo) at the bottom-left corner of your screen, or press the Windows key on your keyboard.
      • Step 2: Search for Command Prompt:
        • In the Start Menu search bar, type cmd or Command Prompt.
        • The Command Prompt application will appear in the search results.
      • Step 3: Open Command Prompt:
        • Click on Command Prompt from the search results, or press Enter after typing "cmd".
        • The Command Prompt window will open.
      • Step 4: Run as Administrator (Optional):
        • If you need administrator privileges to execute certain commands, right-click on Command Prompt and choose Run as Administrator.
        • A prompt may appear asking for permission; click Yes to proceed.
      • Step 5: Using the Command Prompt:
        • Now that the Command Prompt window is open, you can type commands directly into it.
        • For example, typing dir will list the files and folders in the current directory.

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