Librarians

As you're probably aware, Barcelona is a very cosmopolitan city. At our regular get togethers you can meet and get to know many people from around the world. **PLEASE JOIN OUR MAIN GROUP** [https://www.meetup.com/es-ES/barcelona_meetings/](https://www.meetup.com/es-ES/barcelona_meetings/) **and find out week-end and holiday events.** Would you like to learn, practice and teach languages and cultures of the world? We are learning and teaching mainly **Spanish, Catalan, Japanese, Chinese, Korean** and some other European and Asian languages and cultures. Some of our common languages at our events: * **[Spanish](https://magradacatalunya.com/barcelona/index.html)** * **[Japanese](https://magradacatalunya.com/barcelona/japanese.html)** * **[Chinese](https://magradacatalunya.com/barcelona/chinese.html)** * **[Korean](https://magradacatalunya.com/barcelona/korean.html)** * **[French](https://magradacatalunya.com/barcelona/french.html)** * **[German](https://magradacatalunya.com/barcelona/german.html)** * **[Rumanian](https://magradacatalunya.com/barcelona/rumano.html)** * **[Urdu](https://magradacatalunya.com/barcelona/urdu.html)** ♪\*:・’゜♭.:\*・♪’゜。.\*#:・’゜♪ **Every Monday, 20:45 - 22:55** The New Orleans Coffee : [Pere d'Artés 10, Barcelona](https://goo.gl/maps/uS9q1Pq2xfyaJv8P8) **Every Wednesday, 20:30 - 22:35** Viena Calle Pelayo : [Pelai, 16, Ciutat Vella, Barcelona](https://maps.app.goo.gl/ovcj4eFarKCPatkPA) **Every Friday, 21:10 - 23:10** Alex Bar Restaurant : [Córcega 170, Barcelona](https://goo.gl/maps/q8RhMJVTvL2QTgLn8) ♪\*:・’゜♭.:\*・♪’゜。.\*#:・’゜♪ Check out **[our slideshow](https://magradacatalunya.com/A-diapositiva/)** to see how we have a great at each event. ♪\*:・’゜♭.:\*・♪’゜。.\*#:・’゜♪ If you are interested in the languages and cultures of the world, check out these pages, too. * **[Barcelona International Meetings](https://magradacatalunya.com/barcelona/international_meetings.html)** * **[Learn, practise and teach many languages](https://note.com/mundinyol/n/nee2f63e2147c?magazine_key=me4b497673d7d)** * **[Cataluña, entre el cielo y la tierra](https://magradacatalunya.com/barcelona/catalonia.html)** * **[Aprendamos japonés en Barcelona](https://sites.google.com/view/japones-barcelona/cursos_de_japones)** ♪\*:・’゜♭.:\*・♪’゜。.\*#:・’゜♪ And also watch our videos on You Tube * **[Discover Catalonia](https://www.youtube.com/playlist?list=PLb4-3GpRGgihljzjCxAzKT5YZYkjwbrtM)** * **[Discover Spain](https://www.youtube.com/playlist?list=PLb4-3GpRGgih3t-NZ5yU045y6WyLKsh48)**

**BOOK YOUR GAME TABLE FROM MONDAY TO SUNDAY AT THE ARCHIVO ARCANO** 🎲 Welcome to the best board games club in Barcelona! Become a free member and enjoy a unique space to play, with its own games library, shop and themed rooms. **What is a board game club?** The ARCHIVO ARCANO is not just a store with tables to play; It is an exclusive space for members, where you can enjoy your games quietly while having a drink or something to eat surrounded by games and manuscripts. **How to be a member?** Easy. You can become a member for free by purchasing a Primigenia Membership. If Arcanism gets the better of you, you'll always be in time to upgrade to Cult or Arcane membership, with more and better perks. You can become a member directly in the ARCHIVO ARCANO or at [ARCHIVO ARCANO](https://www.archivoarcano.com) **Table reservations** You can reserve a table at any time. For a price of €6 per person, you will have your table for a whole 5-hour time slot (morning, noon or evening) from Monday to Sunday between 10am and 10pm. You can book through meet up, on wahtsapp at +34930253566 or at [BOOK A TABLE HERE](https://www.archivoarcano.com/reservas) **Board Games** Do you want to try games before buying them or just don't want to bring your own? Take a look at more than 200 games available in the Arcane Archive and come play any of them: you can request it when making your reservation or directly at the venue. You already know the advantages, you are just one step away from enjoying them all. Look through the lock, the ARCHIVO ARCANO awaits!

Aerial yoga Dinamico a dynamic and uplifting experience that makes you feel light, strong, and energized from the very first class — perfect for anyone looking to try something fun and different! And after flying in the hammock, you’re welcome to stay, relax, and enjoy a soothing cup of tea with the group. Aero Yoga Dinámico una experiencia dinámica y emocionante que te hará sentir ligero, fuerte y lleno de energía desde la primera clase — ¡ideal para quienes quieren probar algo diferente y divertido! Y después de volar en la hamaca, te invitamos a quedarte a disfrutar de un té relajante, perfecto para compartir y conectar con el grupo. \*Only with reservation [Envianos un mensaje en Whats App :)](https://wa.me/message/6TUN57VE6T5HO1)

**🇬🇧 The Language Exchange Meetup in Barcelona 🌍** Are you ready for an evening filled with language practice, new friendships, and tons of fun? Join our vibrant community in Barcelona where language enthusiasts gather to enhance their proficiency in various languages and expand their social circles. Embark on a linguistic adventure with us! Our language exchange sessions take place in the heart of the city, within the unique atmosphere of Space Cowboy 🤠 🗓️ **When**: Every Monday at 7pm 📍 **Where**: Space Cowboy: 31 Carders street (5 minutes from Jaume I or 8 minutes from Arc de Triomf station) 🆓 **Admission: Free**, with a friendly request to support the venue by ordering a minimum drink (€4). Please, remember that SIGNING UP IS MANDATORY for all the events, thus we can bring enough stickers for everyone. This inclusive event welcomes everyone, so come and mingle with us! (Participants under 18 must be accompanied by an adult.) 📸 We'll seek your permission before capturing any moments on camera. Agreeing to be in a photo means you're okay with us sharing it on social media. 🗣 A friendly host will hand you a sticker with your name, native language, and the language you're eager to practice. Feel free to stick to your mother tongue if you prefer. Let's make language learning a joyous journey! 😊 Our events are published on various platforms so there are always more attendees than those confirmed. **Stay Connected**: 📸 Follow us on [Instagram](https://www.instagram.com/barcelonalanguageexchange/)! 👍 Like our [Facebook page](https://www.facebook.com/thefridaylanguageexchange) to see all the albums! 🌐 Discover more about us on [our website](https://speakquick.es). 📱 **Connect on WhatsApp**: [Join the group here](https://chat.whatsapp.com/D3UQm1CAFECGyE5RknlvXQ) See you there for an evening of laughter, language, and lasting friendships. **Come alone, leave with friends!** 🌍🗣️ \-\-\- 🇪🇸 **¡El Intercambio de Idiomas de Barcelona!** 🌍 ¿Estás listo para una velada llena de práctica de idiomas, nuevas amistades y mucha diversión? Únete a nuestra animada comunidad en Barcelona, donde entusiastas de los idiomas se reúnen para mejorar su nivel y ampliar sus círculos sociales. ¡Embárcate en una aventura lingüística con nosotros! Nuestras sesiones de intercambio de idiomas tienen lugar en el corazón de la ciudad, en el ambiente único de Space Cowboy 🤠 🗓️ **Cuándo**: Todos los lunes a las 19h. 📍 **Dónde**: Space Cowboy: calle Carders 31 (a 5 minutos del metros Jaume I o a 8 min de Arc de Triomf) 🆓 **Entrada Gratuita**, solo te pedimos que tomes una consumición mínima (4€). Por favor, recuerda que LA INSCRIPCIÓN ES OBLIGATORIA para todos los eventos, para que podamos llevar suficientes pegatinas para todos. Este evento inclusivo da la bienvenida a todos, así que ¡ven y únete a nosotros! (Los participantes menores de 18 años deben ir acompañados por un adulto.) 📸 Pediremos tu permiso antes de capturar cualquier momento en cámara. Al aceptar estar en una foto, nos permites compartirla en las redes sociales. 🗣 Un anfitrión te entregará una pegatina con tu nombre, idioma nativo y el idioma que deseas practicar. Siéntete libre de hablar en tu lengua materna si lo prefieres. ¡Hagamos del aprendizaje de idiomas un viaje lleno de alegría! 😊 Nuestros eventos se publican en varias plataformas por lo que siempre hay más asistentes que los que aparecen confirmados. **Mantente Conectado**: 📸 ¡Síguenos en [Instagram](https://www.instagram.com/barcelonalanguageexchange/)! 👍 ¡Dale 'me gusta' a nuestra [página de Facebook](https://www.facebook.com/thefridaylanguageexchange), para ver todos los álbumes! 🌐 Descubre más sobre nosotros en [nuestra web](https://speakquick.es). 📱 **Conéctate en WhatsApp**: [Únete al grupo aquí](https://chat.whatsapp.com/D3UQm1CAFECGyE5RknlvXQ) Nos vemos para una tarde de risas, idiomas y amistades duraderas. **¡Ven solo, márchate con amigos!** 🌍🗣️

La propera trobada de la colla **[Treu la llengua (de l'armari)](https://www.treulallenguadelarmari.cat/), de Barcelona,** grup de conversa LGTBI+ en català, serà al bar **Moeem** el dilluns 9 de març a les 19:30 h. Els **NOUS PARLANTS sou especialment benvinguts** per practicar la llengua amb nosaltres. Animeu-vos a venir-hi. Es punxaran també **hits en català**! The next LGTBI+ meet-up of the **[Treu la llengua (from the closet)](https://www.treulallenguadelarmari.cat/)** group from **Barcelona**, group of conversation in Catalan language, will take place at the **Moeem** bar, on Monday 9th March at 7.30 PM. **NEW SPEAKERS are particularly welcome** to come and practice the language with us. Come and join us! **Hits in catalan** will be played as well! El próximo encuentro del grupo **[Treu la Llengua (del armario)](https://www.treulallenguadelarmari.cat/) de Barcelona**, grupo de conversación LGTBI+ en catalán, tendrá lugar en el bar **Moeem**, el lunes 9 de marzo a las 19:30 h. Los **NUEVOS HABLANTES sois especialmente bienvenidos** a practicar la lengua con nosotros. Animaos a venir. Se pincharán también **hits en catalán**! La prochaîne rencontre du group **[Treu la Llengua (du placard)](https://www.treulallenguadelarmari.cat/) de Barcelone**, group d'entretien LGTBI+ en catalan, va se tenir au bar **Moeem** lundi 9 mars à 19h30. **Les NOUVEAUX LOCUTEURS, vous êtes spécialment bienvenus**, pour mener à bien la pratique de la langue avec nous. Venez nous rejoindre. On jouera aussi des **hits en catalan**!

**STREET FOOTBALL TRAINING** Join [Almas Libres](https://almas-libres.org), Spain’s largest women-led urban sports community, for our weekly street football training with our federated coaching team. Each session is split: 50% skills and fitness, 50% game play = 100% focused on leveling up the playing field for everyone. Build your confidence, technique, and love for the game in a supportive, empowering space. Powered by [Nike.](https://www.nike.com/es/?cp=93577296208_search_&Macro=-nike%20shoes-g-10575086106-109984426528-e-c-EN-pure-452199484522-kwd-11642601-1005424&gclsrc=aw.ds&ds_rl=1252249&gad_source=1&gad_campaignid=10575086106&gbraid=0AAAAADq9vlMVGVJZqQj3BiMHIU5qe3MHT&gclid=Cj0KCQjwtpLABhC7ARIsALBOCVr3g5lf6cJNrQcKGLcIhE0Z8p8H5SBMNtDElN34dEFDu_pKkaOZWLYaAg0NEALw_wcB) **WHEN** Every Monday (*Except Public Holidays*) **TIME** 19:00-20:00 **LOCATION** Pg. de Salvat Papasseit, 45, 08003 **CONTRIBUTION** 5€ **EQUIPMENT** All the equipment provided All sessions held in Catalan, Spanish & English.

Hi and welcome to our next Socrates Café philosophy meetup! Do you have a hunger for deeper understanding of yourself and the world? Do you value deep, honest and respectful dialogue? If yes, then this meetup will be very interesting for you. • WHAT IS A MEETUP ABOUT? We ask, answer and discuss questions and ideas to stimulate critical thinking and to widen our perspectives with new concepts and thoughts. The main purpose of these meetups is to enrich ourselves with the perspectives of others, not to convince others about our own perspectives. Our meetups are about our own philosophies of life and not necessarily what the great philosophers and academics have said or written. It is not a debating club or a platform for proselytizing. Instead, we place the emphasis on questioning, open mindedness and challenging our own assumptions while listening to and respecting the views shared by others. A Socrates Café meetup is considered a success when participants leave a discussion with many more questions than they had at the beginning. • WHAT TOPIC IS DISCUSSED AT THE MEETUP? Participants suggest topics at the beginning of each meeting. We then vote and choose that event's most popular topic for discussion. No academic training in philosophy necessary; just enthusiasm for exchanging ideas and points of view. Some examples of subjects chosen on previous meetups: * What ideals are worth dying for? * Why are we never satisfied? * Why is it that human beings know that the society is going wrong, leaders are well informed about it and things continue as is? * Is identity necessary? * How can it be that people in democratic societies are so obsessed with power? (Desire to be different, better, stronger than others) * What is friendship? • WHO PARTICIPATES AT THIS MEETUP? Anybody is more than welcome to join our meetups. Our events gather people from different backgrounds, different cultures, while no philosophical background is mandatory. Our usual participants are people that have a hunger for deeper understanding of themselves and the world. People that value deep, honest and respectful dialogue. The inspiration for Socrates Cafe originates with the book of the same name, written by the philosopher Christopher Phillips. (Socrates Cafe: A Fresh Taste of Philosophy, 2002). Phillips felt that the Socratic method of dialogue and discussion should be practiced not just in academic settings, but among everyday people interested in examining deep questions together. Hundreds of Socrates Cafe groups now exist around the world. To learn more, visit [https://socratescafe.com](https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsocratescafe.com%2F&data=05%7C02%7C%7C1b245fc060a24a1b22c508dd324f736a%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638722038989360624%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=pLtcEu25qgDHP1XvhFs5Cx4L1rRDYmqwnNWgxalKovY%3D&reserved=0 "Protegido por Outlook: https://socratescafe.com/. Haga clic o pulse para seguir el vínculo.").

Hola Barcelona We’re kicking off the year with energy and strong community vibes - and there’s no better way to do that than getting together in person! OpenMetadata is coming to Barcelona, and we’d love for you to join us! This meetup is all about bringing Barcelona’s data community together for real, down-to-earth conversations about metadata, governance, and what it actually takes to build data platforms that scale. **When: March 11, 2026 at 18:00 CET to 21:00 CET** **What to expect:** • Special guest: Sequra’s data team sharing their OMD journey \- Ariadna Cuffi\, Data Governance Lead \- how Sequra operationalized governance and drove real adoption across teams\. \- Martín Langberg\, Senior Data Engineer \- launched the OMD POC\. \- Roman Vasilev\, built the Claude integration\. • A session with Pere, one of OpenMetadata’s founding engineers He’ll share behind-the-scenes stories from building OpenMetadata in the open - lessons learned, architectural decisions, and what it really takes to grow an open source data project. • Open discussion + community sharing We want this to be interactive. If you’re using OpenMetadata (or exploring it), we’d love for you to share your journey, challenges, or use case. • Snacks, beer, wine & relaxed networking After the talk, we keep it informal - good conversations, new connections, and a little bit of cerveza! This event is about building real momentum for Barcelona’s data ecosystem in 2026 - connecting practitioners who care about metadata, data quality, lineage, governance, and open collaboration. If you’re open to taking the mic for a few minutes to share your experience, we’d love that too!! If you are interested in presenting at our meetup, [please fill out this Call for Speakers! ](https://docs.google.com/forms/d/e/1FAIpQLSezlYjfwB40BgQ5HbhSqs6dDHcwMkgTeEFQtsIa6k3yOhNYjQ/viewform?usp=dialog) Let’s build something meaningful together. See you there. Friendly reminder, the event starts at 6pm CET - 9pm CET

Hello everyone, 👉🏻 Looking for a regular dance class ? 🌿 ASK FOR YOUR TRIAL CLASS // FROM SEPTEMBER 2025 to JUNE 2026🌿 If you’re thinking about bringing contemporary or jazz dance into your weekly routine, I’m teaching in Gràcia at two different studios. There are 7 groups in total, ranging from complete beginners to advanced dancers. Classes take place in: 🌿 Gràcia (metro Joanic / Fontana) 👉🏻 Wednesdays / 18:30 - 20:00 (contemporary beginners - intermediate) / 20:15 - 21:45 (contemporary intermediate - advanced) 🌿 Gràcia (metro Lesseps / Fontana) 👉🏻 Thursdays / 18:30 - 20:00 (contemporary beginners - intermediate) / 20:00 - 21:30 (jazz all levels) 👉🏻 Fridays / 10:00 - 11:30 (contemporary complete beginners) / 11:30 - 13:00 (contemporary intermediate) / 13:30 - 15:00 (contemporary intermediate - advanced) You’ll be joining an existing, multicultural and mixed-level group. Classes are offered in English, Spanish, and French if needed. My approach blends improvisation, coordination, cardio, and body quality work — with a focus on sensation over form. If you're interested, feel free to send me a DM on WhatsApp or Instagram (IG: @sylvain_ludovico) Wishing you a great start to the season — see you soon! 🙌🏻🤸🏻‍♀️

This new book club approaches foundational texts that have shaped the past three centuries through a cross-disciplinary reading series that invites us to engage with the questions of our present. Each session pairs one of these works with a strictly contemporary text (as an optional reading), creating a dialogue in which the past becomes a lens for thinking the present, and vice versa. **No academic background is required; curiosity and openness are all you need.** *BUY THE BOOKS HERE:* **This month we will be reading [Sigmund Freud's ](https://backstorybookshop.shop/product/civilization-and-its-discontents/)*[Civilization and Its Discontents](https://backstorybookshop.shop/product/civilization-and-its-discontents/)*. Paired with [Byung-Chul Han's ](https://backstorybookshop.shop/product/the-burnout-society/)*[The Burnout Society](https://backstorybookshop.shop/product/the-burnout-society/)*.** Hosted by Josefina Alippi

Hello everyone, 👉🏻 Looking for a regular dance class ? 🌿 ASK FOR YOUR TRIAL CLASS // FROM SEPTEMBER 2025 to JUNE 2026🌿 If you’re thinking about bringing contemporary or jazz dance into your weekly routine, I’m teaching in Gràcia at two different studios. There are 7 groups in total, ranging from complete beginners to advanced dancers. Classes take place in: 🌿 Gràcia (metro Joanic / Fontana) 👉🏻 Wednesdays / 18:30 - 20:00 (contemporary beginners - intermediate) / 20:15 - 21:45 (contemporary intermediate - advanced) 🌿 Gràcia (metro Lesseps / Fontana) 👉🏻 Thursdays / 18:30 - 20:00 (contemporary beginners - intermediate) / 20:00 - 21:30 (jazz all levels) 👉🏻 Fridays / 10:00 - 11:30 (contemporary complete beginners) / 11:30 - 13:00 (contemporary intermediate) / 13:30 - 15:00 (contemporary intermediate - advanced) You’ll be joining an existing, multicultural and mixed-level group. Classes are offered in English, Spanish, and French if needed. My approach blends improvisation, coordination, cardio, and body quality work — with a focus on sensation over form. If you're interested, feel free to send me a DM on WhatsApp or Instagram (IG: @sylvain_ludovico) Wishing you a great start to the season — see you soon! 🙌🏻🤸🏻‍♀️

A casual (but coordinated) coffee break to meet new friends, take a Zoom break, and get your AM caffeine fix. Stop by for a few minutes or stay the whole time. Bring a friend or wander in solo. Come for the coffee and company, or just bring a book to read while surrounded by other in-real-life, community-seeking humans. Come by every Friday, or just when you happen to be in town. Make it whatever you need it to be that week. It's not an \*event\* per se, but we hope these Friday meet-ups can become a fixture of the bookshop! Gathering spot will be in the downstairs area of the bookshop (near the Community Library). Coffee and tea are 1.50€ and can be purchased at the cash register upstairs. Find more info on our Instagram (@backstorybookshop) or website (www.backstorybookshop.com).

**Hello everyone,** 👉🏻 Looking for a regular dance class? 🌿 **ASK FOR YOUR** **TRIAL CLASS // FROM SEPTEMBER 2025 TO JUNE 2026** 🌿 If you’re thinking about bringing contemporary or jazz dance into your weekly routine, I’m teaching in Gràcia at two different studios. There are 7 groups in total, ranging from complete beginners to advanced dancers. Classes take place in: 🌿 Gràcia (metro Joanic / Fontana) 👉🏻 Wednesdays / 18:30 - 20:00 (contemporary beginners - intermediate) / 20:15 - 21:45 (contemporary intermediate - advanced) 🌿 Gràcia (metro Lesseps / Fontana) 👉🏻 Thursdays / 18:30 - 20:00 (contemporary beginners - intermediate) / 20:00 - 21:30 (jazz all levels) 👉🏻 Fridays / 10:00 - 11:30 (contemporary complete beginners) / 11:30 - 13:00 (contemporary intermediate) / 13:30 - 15:00 (contemporary intermediate - advanced) You’ll be joining an existing, multicultural and mixed-level group. Classes are offered in English, Spanish, and French if needed. My approach blends improvisation, coordination, cardio, and body quality work — with a focus on **sensation over form**. If you're interested, feel free to send me a DM on WhatsApp or Instagram (IG: **@sylvain_ludovico**) Wishing you a great start to the season — see you soon! 🙌🏻🤸🏻‍♀️

Vídeo presentación: [https://youtu.be/alzG1rokS1o](https://youtu.be/alzG1rokS1o) ¡Atención! Enviad vuestros textos para la Revista: (artículos, reseñas, textos de ficción, etc.) **[https://letraheridos.es/colaboraciones/](https://letraheridos.es/colaboraciones/)** Empezaremos puntuales, así que no tardéis :) Encuentro para amantes de la literatura. Escritores, lectores o simplemente curiosos. Usuario en **Goodreads** con nuestras lecturas: [https://www.goodreads.com/user/show/108384464-letraheridos](https://www.goodreads.com/user/show/108384464-letraheridos) Pedimos a los participantes que traigan un libro de lectura reciente que les haya emocionado o impactado. En vez de un club de lectura donde todos leemos el mismo libro y lo comentamos, cada uno trae una propuesta para recomendar a los demás. Ocasionalmente compartimos escritos. http://photos3.meetupstatic.com/photos/event/7/9/7/2/600_455971090.jpeg

Ciao a tutt\*! Let's meet Monday at 6.30pm at the Upper Arlington Library (**Tremont** Branch) in **Meeting Room A** to speak in Italian for 1 hour. Keeping Monday for consistency but we can discuss if there are better days/times/locations!

Join us for our March Book Club gathering where we will come together to discuss *The Manor of Dreams* by Christina Li in a safe and welcoming environment. Make new friends who share your passion for books and connect with fellow LGBTQ book enthusiasts.

**We are expanding our creative programming opportunities with Queer Quills, a quiet writing and sharing space. Queer Quills features some prompts, supplies and friendly faces to help get some inspiration or feedback for your writing. Hope to see you there!**

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)

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.