Enterprise Resource Planning

Celebrate the coming of spring with dance! Join local Brazilian favorite Lunna Gomes at Roda Movements in Wheaton, MD. Forro for fun and for a good cause, we are raising money to support the Afro-Bahia Fest and local music groups. Lunna's forro dance class is open to all levels. After class, let's have a turn on the dance floor, dance social starts after class. Event cost : $12

Pre-registration and Payment required: [https://www.wellnessliving.com/rs/event/teal_center?k_class=919488](https://www.wellnessliving.com/rs/event/teal_center?k_class=919488) **Awaken the sacred within. Reclaim your soul’s truth.** Beneath all the noise, the patterns, and the pain, your soul has never stopped whispering. It holds the memory of every choice, every wound, every triumph across time. This vibrational archive—your Akashic Records—awaits you. And within them: clarity, healing, and a return to the Divine spark of who you truly are. Let’s take a breath and reflect… \~Have you been feeling like you're moving through life in a loop—taking one step forward, only to be pulled back again and again? \~Does life feel like an ongoing storm of confusion, struggle, or emotional unrest? \~Do you long for heartfelt, soul-level connection—but feel it remains just out of reach? \~Are you living the life your heart calls you to…or the one others expect? **If you’ve felt this, take comfort: you are not broken. You are awakening. You’ve been guided to this moment for a reason. Your soul knows it's time to return home to your truth.** **\*\*Welcome to the Akashic Records\*\* a timeless sanctuary of compassion, wisdom, and love.** In this deeply healing workshop, you're invited not just to explore your story—but to rewrite its energetic imprint. Guided by the compassionate presence of **Bill Sanda**, you'll step into a space where healing is not only possible, but inevitable—when met with an open heart. This isn’t just another offering. This is a soul-remembrance. During our time together, you will: ✨ **Uncover the hidden patterns of your past**, including the emotional echoes, ancestral threads, and past-life imprints that continue to influence your present reality ✨ **Liberate yourself from repetitive cycles** of fear, doubt, or stagnation, so you can move forward in alignment with your soul’s highest expression ✨ **Receive healing directly from your Akashic Records**, reconnecting to your innate wisdom and Divine blueprint ✨ **Remember who you are beyond this lifetime**, as insights from past incarnations help you navigate your current path with grace ✨ **Experience the sacred sound of Light Language**—a celestial, soul-coded vibration that speaks beyond the mind, clearing density, activating remembrance, and harmonizing your energy at the DNA level Bill’s sacred gift of channeling the Akashic Records—woven together with the high-frequency transmission of Light Language—creates a multidimensional space for profound transformation. You’ll also receive personal attention during the workshop through mini-healing sessions, and we'll culminate in a group integration, inviting a collective shift in vibration and consciousness. Pre-registration and Payment required: [https://www.wellnessliving.com/rs/event/teal_center?k_class=919488](https://www.wellnessliving.com/rs/event/teal_center?k_class=919488) **Here’s what others have shared about their experience:** *“Bill is exceptionally gifted… It seemed that everyone had erased years... looking so much younger and so much more relaxed and at peace than before the session. The shift happening for each person was actually physically visible.”* — *Cindy W.* *“Finally, I understand what has been causing the sabotaging behaviors. Two days later, I’m clearer and more spiritually connected than I’ve ever been. Thank you, Bill, for your healing gifts.”* — *Wendy W.* ***About Bill Sanda*** *A lifelong seeker and heart-led healer, **Bill Sanda** walks with humility, clarity, and deep reverence for the sacred. His journey has led him to study with some of today’s most respected spiritual masters, but it was through divine revelation that his ability to work within the Akashic Records and transmit Light Language fully emerged.* *Bill now offers this work as a gift of service—to support others in awakening to their truth, releasing what no longer serves, and remembering the wholeness that has always been within. His mission is simple and powerful: to support your healing on all levels—**emotional, physical, mental, and spiritual**—so you can live more aligned, more free, and more fully alive.* **Investment: $75** Pre-registration and Payment required: [https://www.wellnessliving.com/rs/event/teal_center?k_class=919488](https://www.wellnessliving.com/rs/event/teal_center?k_class=919488)

Pre-registration and Payment required: [https://www.wellnessliving.com/rs/event/teal_center?k_class=919488](https://www.wellnessliving.com/rs/event/teal_center?k_class=919488) **Awaken the sacred within. Reclaim your soul’s truth.** Beneath all the noise, the patterns, and the pain, your soul has never stopped whispering. It holds the memory of every choice, every wound, every triumph across time. This vibrational archive—your Akashic Records—awaits you. And within them: clarity, healing, and a return to the Divine spark of who you truly are. Let’s take a breath and reflect… \~Have you been feeling like you're moving through life in a loop—taking one step forward, only to be pulled back again and again? \~Does life feel like an ongoing storm of confusion, struggle, or emotional unrest? \~Do you long for heartfelt, soul-level connection—but feel it remains just out of reach? \~Are you living the life your heart calls you to…or the one others expect? **If you’ve felt this, take comfort: you are not broken. You are awakening. You’ve been guided to this moment for a reason. Your soul knows it's time to return home to your truth.** **\*\*Welcome to the Akashic Records\*\* a timeless sanctuary of compassion, wisdom, and love.** In this deeply healing workshop, you're invited not just to explore your story—but to rewrite its energetic imprint. Guided by the compassionate presence of **Bill Sanda**, you'll step into a space where healing is not only possible, but inevitable—when met with an open heart. This isn’t just another offering. This is a soul-remembrance. During our time together, you will: ✨ **Uncover the hidden patterns of your past**, including the emotional echoes, ancestral threads, and past-life imprints that continue to influence your present reality ✨ **Liberate yourself from repetitive cycles** of fear, doubt, or stagnation, so you can move forward in alignment with your soul’s highest expression ✨ **Receive healing directly from your Akashic Records**, reconnecting to your innate wisdom and Divine blueprint ✨ **Remember who you are beyond this lifetime**, as insights from past incarnations help you navigate your current path with grace ✨ **Experience the sacred sound of Light Language**—a celestial, soul-coded vibration that speaks beyond the mind, clearing density, activating remembrance, and harmonizing your energy at the DNA level Bill’s sacred gift of channeling the Akashic Records—woven together with the high-frequency transmission of Light Language—creates a multidimensional space for profound transformation. You’ll also receive personal attention during the workshop through mini-healing sessions, and we'll culminate in a group integration, inviting a collective shift in vibration and consciousness. Pre-registration and Payment required: [https://www.wellnessliving.com/rs/event/teal_center?k_class=919488](https://www.wellnessliving.com/rs/event/teal_center?k_class=919488) **Here’s what others have shared about their experience:** *“Bill is exceptionally gifted… It seemed that everyone had erased years... looking so much younger and so much more relaxed and at peace than before the session. The shift happening for each person was actually physically visible.”* — *Cindy W.* *“Finally, I understand what has been causing the sabotaging behaviors. Two days later, I’m clearer and more spiritually connected than I’ve ever been. Thank you, Bill, for your healing gifts.”* — *Wendy W.* ***About Bill Sanda*** *A lifelong seeker and heart-led healer, **Bill Sanda** walks with humility, clarity, and deep reverence for the sacred. His journey has led him to study with some of today’s most respected spiritual masters, but it was through divine revelation that his ability to work within the Akashic Records and transmit Light Language fully emerged.* *Bill now offers this work as a gift of service—to support others in awakening to their truth, releasing what no longer serves, and remembering the wholeness that has always been within. His mission is simple and powerful: to support your healing on all levels—**emotional, physical, mental, and spiritual**—so you can live more aligned, more free, and more fully alive.* **Investment: $75** Pre-registration and Payment required: [https://www.wellnessliving.com/rs/event/teal_center?k_class=919488](https://www.wellnessliving.com/rs/event/teal_center?k_class=919488)

Join us at the Chess Center offices (Suite 118, entrance on 2nd Avenue) on Saturday afternoons from 1:00 – 5:00pm ET for open play. Players of all abilities and ages are welcome. * Non-Members: $5.00/player table fee for the day. * Chess Center [Members](https://chessctr.org/membership/) always play for FREE ($0.00). Check our social media ([Twitter](https://twitter.com/uschess) / [Facebook](https://www.facebook.com/USChessCenter)) for closure announcements: The Chess Center is closed on major holidays. We also have chess sets, clocks, and [used chess books](https://chessctr.org/usedbooks/) for sale.

This month, we'll have a recorded talk, followed by discussion, on API design and single-header libraries. How should we structure and program libraries to impose as few usage constraints as possible? We’ll look at [the STB libraries](https://github.com/nothings/stb) and other examples as case studies. We're still at the West End Library - see the location in the sidebar for details. **Agenda:** \- 2pm \- 3pm: Library discussion \- 3pm \- 4pm: Open\-ended discussions\, presentations\, etc\. \- 4pm \- whenever: We'll go get food nearby\! **What we do** Presentations on lower-level, foundational programming topics, ethical software, knowledge sharing, mentoring, and discussion. **Who we are:** We are all about handmade software. Rather than focus on frameworks, heavy abstractions, and buzzwords - we typically create projects or research topics that build an understanding of foundational computing concepts, essential data structures, and hardware/software interaction. **What to bring?** Bring a laptop, project, or just a curious mind. If you're not sure you're ready to contribute, don't worry: we're all here to share our passions and hone our craft. **If you arrive late:** Please enter the room quietly as to not disrupt anyone that is presenting. You can take any empty seat.

We will be playing up to two games of Power Grid. All experience levels welcome. Expect the game teach to start promptly within the first 10 minutes. Power Grid is an economic network building strategy game with a fluctuating commodities market and an auction round. The objective of Power Grid is to supply the most cities with power. Players mark pre-existing routes between cities for connection, and then bid against each other to purchase the power plants that they use to power their cities. As power plants are purchased, newer, more efficient plants become available, so by merely purchasing, you're potentially allowing others access to superior equipment. Additionally, players must acquire the raw materials (coal, oil, garbage, and uranium) needed to power said plants (except for the 'renewable' windfarm/ solar plants, which require no fuel), making it a constant struggle to upgrade your plants for maximum efficiency while still retaining enough wealth to quickly expand your network to get the cheapest routes. Find [here](https://www.youtube.com/watch?v=JfvCc9uGN-U&pp=ygUWaG93IHRvIHBsYXkgcG93ZXIgZ3JpZA%3D%3D) a how to play video on youtube. Find [here](https://www.riograndegames.com/wp-content/uploads/2018/12/Power-Grid-Recharged-Rules.pdf) the rulebook. Note: Please remember to update your RSVP if you can not attend the event. By updating your RSVP when you can't make it other players on the waitlist will have a chance to attend. No-shows may make it harder to attend future meetups. Also, all library rules apply to this meetup event. Mainly that no food is allowed in the library. Covered drinks are allowed.

Our Curanderimo Elder Ixtoii Paloma Cervantes will be traveling to Virginia and teaching this in person two day candle magic workshop where you will learn the traditional Curanderismo way of using candles for bringing blessings and healings. You will learn how to prepare them, how to use them to manifest what you want in life, how to see if they are working or not, and how to read them in the Curanderismo ways. Important Note: The purpose of this workshop is to enhance spiritual growth and well-being. Any misuse of the teachings will not be tolerated, and participants with hidden agendas or intent to harm others will be asked to leave without a refund. INFORMATION: Type of event: Spiritual Workshop. Who can participate: This workshop is open to everyone. You don't need to know anything at all. You need only an open heart to learn something new. This is a two day intensive in person workshop. We will email a list of what to bring and how to prepare for this workshop as soon as you book. Workshop Details: Dates: Saturday, March, 8 and Sunday, March 9 Time: 9:00 AM - 5:00 PM (Same start and finish time on both days) Tuition: $627 via cash or Zelle. Payment Plan available email healing@curanderasheart.com The full payment is due by February 27 How to book: Contact Curandera Jenny Perez at 703.531.7046

**THE POWER OF THE SUBCONSCIOUS OVER YOU** You are welcome to arrive 15 minutes early for refreshments! At the lecture "The Power of the Subconscious", the speaker will clearly and understandably explain topics such as: * What is the exact definition of the Subconscious Mind? * How does it inflict unwanted feelings and anxiety in you? * What determines how much pressure it exerts on a person? * What exactly is the goal of the subconscious? This is not just a lecture where you sit quietly and listen. It's interactive and LIVE, so you can ask questions at any time. And the most important topic: **HOW DO YOU TAKE CONTROL OF YOUR SUBCOUNSCIOUS!** This group is sponsored by the Dianetics Life Improvement Center.

We’re still working to get more people into these Meetups, but our goal is to give PlayYourCourt members a few social tennis outings each week in addition to your practice sessions and Challenge League matches. These Meetups are co-ed, super laid back, and all skill levels are welcome. Post your skill level and a suggested court in the comments section so we can round up as many players as we can for some tennis fun! Also, if you’re looking to meet new practice partners or play some matches and you aren’t already in the PlayYourCourt Community, you can go here to see what we’re all about and sign up: https://www.playyourcourt.com/tennis-community/silver-spring-md/meetup/ If you love tennis, we’d love to have you! Be sure and watch the quick video that explains how everything works. Happy hitting! - Scott

**THE POWER OF THE SUBCONSCIOUS OVER YOU** You are welcome to arrive 15 minutes early for refreshments! At the lecture "The Power of the Subconscious", the speaker will clearly and understandably explain topics such as: * What is the exact definition of the Subconscious Mind? * How does it inflict unwanted feelings and anxiety in you? * What determines how much pressure it exerts on a person? * What exactly is the goal of the subconscious? This is not just a lecture where you sit quietly and listen. It's interactive and LIVE, so you can ask questions at any time. And the most important topic: **HOW DO YOU TAKE CONTROL OF YOUR SUBCOUNSCIOUS!** This group is sponsored by the Dianetics Life Improvement Center.

We’re still working to get more people into these Meetups, but our goal is to give PlayYourCourt members a few social tennis outings each week in addition to your practice sessions and Challenge League matches. These Meetups are co-ed, super laid back, and all skill levels are welcome. Post your skill level and a suggested court in the comments section so we can round up as many players as we can for some tennis fun! Also, if you’re looking to meet new practice partners or play some matches and you aren’t already in the PlayYourCourt Community, you can go here to see what we’re all about and sign up: https://www.playyourcourt.com/tennis-community/washington-dc/meetup/ If you love tennis, we’d love to have you! Be sure and watch the quick video that explains how everything works. Happy hitting! - Scott

DC Code and Coffee is an inclusive, informal co-working session. It's community-led and community-run by devs, for devs. People of all skill levels attend. Whether you’re dev-curious, aspiring, or a professional developer, we’d love to have you! Come chat or learn to code on a Sunday afternoon with coffee and cool-inclusive people. Bring your laptop! We typically meet every month on the weekend. **Join our online community!** For all things Tech in DC and to get latest updates and tech events from the DMV area, join the [DCTech Slack](https://dctech.chat/). All DC Code & Coffee announcements are in the #dccodecoffee channel **How it works** Near the beginning of the event, we do an introduction circle. You say your name, what you can help others with, and what you would like help with. You can also share job opportunities. After the introduction circle, everything is self-organized. **Event Host and Directions** We are meeting in the big meeting room at the back of the library.

**To receive future event updates, register on Luma:** **[https://luma.com/6qii7007](https://luma.com/6qii7007)** Let's discuss a podcast by Anders Ericsson, author of the renowned book "Peak: Secrets from the New Science of Expertise". Anders demonstrates that talent is overrated and peak achievement is dependent on a specific type of learning called "deliberate practice", and that your skill in any area is a function of the quantity and quality of “mental representations” you have for that activity. We explore the science of learning and of skill mastery -- how it happens, and how to do it. **Please watch this YouTube video (try 1.25x speed) before joining the discussion:** [https://www.youtube.com/watch?v=qiBne5EGBQ8](https://www.youtube.com/watch?v=qiBne5EGBQ8) If more than 8 people join the discussion, we will break out into smaller groups. **(max 8 people per group)** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- 1. **Mastery requires focused quality over mere repetition. How can we ensure our daily efforts are intentional enough to foster genuine growth?** 2. **Effective mentors provide the roadmap for stretching our abilities. How might we better identify the guides who can point out our hidden obstacles?** 3. **Immediate feedback loops are essential for identifying and correcting technical errors. How can we build systems that provide the rapid insights necessary for our collective improvement?** 4. **Peak performance often requires unlearning habits that limit our ultimate potential. What fundamental methods could we refine to ensure our foundations support world-class excellence?** 5. **Growth occurs when we consistently set goals just beyond our current comfort zones. How do we determine the ideal balance between manageable challenge and productive discomfort?** 6. **Elite performance is sustained through intense concentration followed by restorative rest. How can we better value recovery as a vital component of our highest achievements?** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- To provide an enjoyable experience for fellow participants, here are three ground rules during discussion events: 1. Step up and step back. (If you feel that you’ve been talking too much, step back to listen more. If you feel that you’ve been relatively quiet, step up to share your perspective or ask a question) 2. Listen to understand, not to respond. 3. Be open-minded and value differences.

Is your business taking more of your time than you would like? [Rob Young](https://www.linkedin.com/in/cinci-robyoung/) principal at [Stage 3 Group](https://www.linkedin.com/company/stage-3-group/), hosts this workshop series and is the author of Stage 3 Success. * Provides a framework and a playbook for leaders of emerging businesses * Reviews business management tools and techniques for scaling and maturing a business * How to recognize and leverage stories hidden in financial statements * How to implement financial and operational controls and use leading indicators to spot trouble before it occurs * How to manage your time for maximum effect * How to deal with nonperforming employees * How to create standard operating procedures throughout your organization Four sessions will include two hours of content and an optional 90-minute hands-on lab. Reserve your spot via this link: https://clintonvilleba.com/calendar/#!event/2026/3/20/chaos-to-clarity-to-control ($200 for non-CABA members.)

We’re still working to get more people into these Meetups, but our goal is to give PlayYourCourt members a few social tennis outings each week in addition to your practice sessions and Challenge League matches. These Meetups are co-ed, super laid back, and all skill levels are welcome. Post your skill level and a suggested court in the comments section so we can round up as many players as we can for some tennis fun! Also, if you’re looking to meet new practice partners or play some matches and you aren’t already in the PlayYourCourt Community, you can go here to see what we’re all about and sign up: https://www.playyourcourt.com/tennis-community/columbus-oh/meetup/ If you love tennis, we’d love to have you! Be sure and watch the quick video that explains how everything works. Happy hitting! - Scott

Discover Kiro, AWS’s innovative development environment that adapts to your workflow. Whether you prefer specification-driven development or a more intuitive, vibe-based approach, Kiro empowers you to build applications your way. In this session, speakers will explore Kiro’s core functionality and its evolution through re:Invent 2025, along with demonstrations of prompts used to create APIs, hooks, and steering documents. In the latter part of the session, watch as we build a complete example from scratch, showcasing Kiro’s agentic AI workflow in action for spec-driven development and vibe coding. What You'll Learn - Core Kiro concepts and development philosophy Feature evolution: pre and post re:Invent 2025 Practical examples: API creation, hooks, and steering docs Live coding demonstration with real-time problem solving Who Should Attend - Developers, solutions architects, and technical leaders interested in modern AWS development tools and AI-assisted coding workflows. **Speakers Bio:** Matthew Jorat: Matthew Jorat is a Customer Solutions Manager at AWS with nearly three decades of expertise in AI, cloud transformation, migration, modernization, IT, technology, and business. His career spans infrastructure engineer, solutions architect, security auditor, customer success director, support and services director, and operations officer. He was an early adopter of AWS services as a customer, and his current role at AWS uniquely blends his technical and business skills as he partners with executive teams to translate strategic priorities into measurable business outcomes through cloud adoption, AI implementation, and operational excellence. Matt leads end-to-end AI initiatives for enterprise customers, identifying high-impact use cases and maintaining relentless focus on measurable ROI. He holds eight AWS certifications and serves as Adjunct Professor at Franklin University teaching cloud computing and AWS architecture. His expertise encompasses GenAI, agentic AI systems, migration, modernization, and optimization strategies that drive transformation at scale. [https://www.linkedin.com/in/mattjorat/](https://www.linkedin.com/in/mattjorat/) Girish Bhatia: Girish Bhatia is a seasoned technology delivery leader with deep expertise in cross-domain program management. He holds multiple AWS certifications, including AWS Certified Solutions Architect – Associate, AWS Certified Developer – Associate, and AWS Generative AI Practitioner, and is also an AWS Community Builder. Girish brings over two decades of experience in the information technology industry. Throughout his career, Girish has led major technology-driven business transformation from modernizing on-premises applications to driving large-scale cloud migrations. His work includes API-based integration platforms, data-center and mainframe modernization, and enterprise cloud adoption initiatives. Based in Columbus, Ohio, Girish works at a tech-forward fintech company. He is passionate about AWS serverless architectures, Generative AI and emerging cloud technologies. An avid learner and builder, he continues to explore and apply the latest innovations in AWS to help organizations accelerate their digital transformation. https://www.linkedin.com/in/girishbhatia/[https://www.linkedin.com/in/girishbhatia/](https://www.linkedin.com/in/girishbhatia/) **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Have you ever suffered from a traumatic experience, a deep loss or been through a painful breakup? Has your ability to communicate suffered as a result? And after that, even though you "moved on" did you find that things were never quite the same? Have you ever looked at childhood photos, or reminisced your early life and wondered where that happiness and spark went? Are your emotions out of your own control? Have you ever felt, even if you aren’t aware of it, that possibly you are getting in your own way of your happiness and success? How does this affect your self-confidence? Find out what is at the root of all stress, anxiety, depression and self-doubt. Find out how and why you hold yourself back from achieving your goals and having the life you have dreamed of. As soon as you learn what is at the root of these unwanted conditions, you’ll see it is something you can DO something about. You will not be labeled or categorized at this MeetUp.

Drake Lundstrom is presenting: Code Anywhere by Talking to your Phone Abstract: Have you heard the trend of people deploying code anywhere from checkout lines to doctors' offices? In this talk, you will learn how to talk to your phone and have an app on Azure to show your friend 5 minutes later. The basic DevOps tools you already know, plus a little bit of AI magic, are all you need! If you want to follow along, the demo will be in Azure with GitHub Actions and GitHub Copilot, and you can have it set up on your phone by the end of the session. Just come in with an Azure account and a GitHub repo. Join us for pizza, drinks, and networking @ Improving's office. Doors open at 5:45.

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Here is the secret of being positive and free: Thinking positively is not enough. You also have to get rid of the negative thinking. Your mind is like a garden. You can plant many beautiful flowers in it, but if you don't get rid of the weeds when you plant your flowers, the weeds will soon take over the whole garden. A positive thought is like a flower in your mental garden, and a negative thought is like a weed. You cannot expect to have a positive mindset if you continue to have negative thoughts dwelling and growing there. So, how do you get rid of the negative thoughts? That's what this Meetup is all about. Attend this local meeting and find out! The Meetup event will be led by a consultant who had helped many people live happier in life. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is created by the Dianetics & Scientology life improvement center.

Window functions have nothing to do with the Windows operating system but provide a “window” to a result set when used in SQL queries. They are powerful, set-based methods to view data in unexpected ways. Window functions provide easy, set-based solutions to solve some common problems: * Using running totals * Performing operations in intervals * Identifying data gaps and islands * Performing aggregates without losing detail Many people are confused by window functions and do not know how to use them properly. This session will explore window functions, how they work, and how to use them. Demonstrations with several examples will solidify how window functions can simplify queries and make them more powerful.