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SQL

SQL

SQL is the universal language for communicating with databases - a powerful, timeless technology handling everything from simple queries to complex data operations.

Used at
www.sql.org github.com stackoverflow.com

About SQL

SQL - Structured Query Language - is the lingua franca of database management. Whether you work with MySQL, PostgreSQL, SQL Server, or Oracle, SQL runs the show. It's the language you use to query, update, and organize data in relational databases - a cornerstone of IT since the 1970s.

What makes SQL great is that it's both powerful and readable. You can write a simple SELECT to fetch data or construct advanced queries with JOIN, GROUP BY, and WINDOW FUNCTIONS to analyze complex datasets. While each database engine has its own dialects (hello, T-SQL and PL/SQL), the fundamentals are the same - making SQL an invaluable skill for anyone working with data.

So whether you are a developer, data analyst, or just curious about how data is handled behind the scenes, SQL is a language worth learning. It's like having a key to the innermost rooms of the data world.

SQL is used at

AcadeMediaAcadeMedia is the Nordic region's largest education company, operating everything from preschools to adult education with a focus on quality and development.
AddovationAddovation helps businesses grow through smart digital solutions - simple, Nordic and friendly.
Adesso SwedenAdesso Sweden is an IT consultancy that helps companies make digitalisation more than just a buzzword - they make it real.
AFRYAFRY helps companies and communities step into the future with smart, sustainable solutions - from digitalisation to engineering.
AftonbladetAftonbladet is Sweden’s beloved evening newspaper and news platform, with roots dating back to 1830 and a clear vision to make Sweden a little better and everyday life a little easier.
AGIOAGIO is the consulting firm that helps businesses and organisations grow through smart digital solutions and skilled specialists.
AhlsellAhlsell are the professionals who deliver everything from workwear to tools and installation products - a true ally for tradespeople and industry workers.
Aimo ParkAimo Park is one of the Nordic region’s leading parking operators, simplifying everyday life with innovative and convenient parking solutions via app and automated systems.
AM SystemAM System is an energetic SaaS company from Umeå that makes quality and management systems so simple they almost feel magical - all documents, processes and cases in one place.
Amazon Web ServicesAWS EMEA SARL, Sweden branch is Amazon’s local presence in Sweden delivering Amazon Web Services across the Nordics and the EMEA region.
AMF TjänstepensionAMF Tjänstepension is the pension company that makes it simple and secure for millions of Swedes to save for the future.
AnturaAntura helps companies get their projects and portfolios in order with smart digital tools - delivered with a strong focus on simplicity and quality.
AnyfinAnyfin helps you easily and quickly lower the cost of your personal loans and installment plans - all via an app.
Apotek HjärtatApotek Hjärtat is Sweden's largest private pharmacy chain, passionate about health, wellbeing and adding a little extra heart to everyday life.
ApoteketApoteket is Sweden's classic pharmacy chain that puts health and customer service first.
AppostropheAppostrophe builds smart apps that make everyday life easier and nicer - straight from Stockholm to the world.
Arla FoodsArla Foods is more than milk and cheese - it's a world of flavour, innovation and sustainability, from farm to your kitchen.
Arrowhead Game StudiosArrowhead Game Studios is a Swedish game studio creating intense co‑op adventures with offbeat humor, from Magicka to the mega-hit Helldivers 2.
AttendoAttendo cares for people - with warmth, compassion and a big heart.
AxentiaAxentia develops smart, low-energy display solutions that keep public transport running - powered by batteries and solar.
BahnhofBahnhof is Sweden's rebellious internet provider committed to privacy, freedom and fast connections.
Barkfors FleetBarkfors Fleet AB is a seasoned software company delivering smart, sustainable transport solutions for hauliers, freight forwarders and fleet operators for over 30 years.
BHG GroupBHG Group is the Nordic region's largest e-commerce group for home, garden and building - in short, everything for both DIY enthusiasts and professionals.
Björn LundénBjörn Lundén is a Swedish knowledge and software company that simplifies administration for small and medium-sized businesses with intuitive programs and guidance.
BlocketBlocket is Sweden's largest online marketplace - where everything from used sofas to new jobs is bought, sold and traded.
BolidenBoliden is the mining and metals company that supplies the metals for modern life, from copper to gold, with operations across the Nordics and Europe.
Bonnier NewsBonnier News is the Nordic region's largest media house, delivering news that reaches millions of people every day.
BooztBoozt is the fashion and lifestyle company that makes it easy to click home stylish garments and products from hundreds of brands - delivered directly to your door.
BravidaBravida is the company that makes buildings work - from electrical and ventilation systems to security and automation.
BricobombaBricobomba is the data company that loves diving into everything from infrastructure to machine learning - always with people at the center.
BtwentyfourBtwentyfour is a software company from Uppsala that helps e-commerce businesses with system solutions and operations, focusing on digital commerce and technical support.
Burt IntelligenceBurt Intelligence is a Swedish tech company that builds smart software to help media companies and digital publishers better understand and use their data - and make decisions that really make a difference.
BygghemmaBygghemma is Sweden's largest online building supply store - offering everything for the home, garden and renovation projects, delivered to your door.
CaesariCaesari is a high-tech, fast-moving Stockholm-based fintech that combines expertise in algorithms and high-performance systems with a passion for automated trading.
CalabrioCalabrio provides smart, AI-driven solutions for contact centers and workforce management - think streamlined tech charm without the hassle.
CaspecoCaspeco delivers smart, user-friendly system solutions that help restaurants, bars and hotels manage everything from guests to staff and finances.
CDONCDON is an e-commerce platform that brings thousands of merchants and products together in one place - a digital marketplace with something for everyone.
CintCint connects businesses with people around the world through smart solutions for data collection and insights.
Clas OhlsonClas Ohlson is the department store for all small and large everyday solutions - from screwdrivers to smart gadgets for the home.
Combine Control SystemsCombine Control Systems is a technical consultancy that combines control systems, AI/data science and embedded systems to take technology and business solutions to the next level.
CombitechCombitech is the technology and consultancy company that helps businesses and societies become smarter, safer and more sustainable.
CoodyCoody combines the freedom of freelancing with the security of permanent employment - a new way to be a consultant in the tech world.
Coop SverigeCoop Sweden is the grocery chain aiming to make everyday life greener and easier - focused on sustainability, fair ingredients and smart choices for the future.
CoorCoor Service Management is the expert that keeps workplaces and properties running smoothly - from the coffee machine to complex technical systems.
Databricks SwedenDatabricks Sweden AB provides companies with a powerful platform for data management and AI, rooted in open source and academia.
DBT CapitalDBT Capital helps Swedish growth companies scale through flexible, smart business loans that complement traditional banks.
DecernoDecerno builds bespoke IT solutions that make complex operations run smoothly, securely and smartly.
DemaaiDemaai (Dema.ai) is a growing SaaS startup from Stockholm that provides ecommerce businesses with AI-driven insights to optimize marketing, inventory and profitability in real time.
Digpro SolutionsDigpro Solutions develops smart GIS solutions that help companies in electricity, fiber, gas, water and heating sectors get full control over their networks-down to each cable and pipe.
DreamlakeDreamlake is the company that makes cruise shopping online simpler and smarter-their platform helps travel agents and cruise lines sell trips with style and robust technology behind the scenes.
DustinDustin is the tech pro that helps businesses and organizations find the right hardware, services and solutions for a smarter everyday.
EasyparkEasyPark makes parking as easy as using an app and paying by the minute-ideal for individuals, businesses and city planning alike.
EliqEliq helps energy companies and their customers understand, save and use energy more intelligently-through digital solutions that make a difference in everyday life.
Embark StudiosEmbark Studios is the game studio aiming to redefine how games are created and played-combining technology, creativity and a healthy dose of play.
EnityEnity is a Nordic specialist bank focused on mortgages and accessibility-they aim to make home ownership easier for people who don’t fit the traditional big‑bank mould.
Eon SverigeEon Sweden ensures power is available, heat flows and the future becomes a little greener-every day.
FinanaFinana (Datia) is a climate fintech from Stockholm that helps investors transform portfolios into sustainable investments with smart ESG data and auto-generated EU reports.
Finansia SverigeFinansia Sverige helps companies and private individuals make smarter financial decisions with tailored financial solutions.
Flox RoboticsFlox Robotics helps people and wildlife coexist through smart AI robotics and acoustic systems that keep animals away from roads, airports and crops.
FolksamFolksam is a customer-owned insurance and pension company providing security for individuals and businesses across Sweden.
Forefront ConsultingForefront Consulting is a modern consulting firm that helps organizations become smarter, faster, and more data-driven.
FrendaFrenda develops smart cloud-based solutions that make everyday dentistry both simpler and more efficient.
FrodaFroda offers business savings and company loans up to 5 million SEK - with a digital, transparent process and embedded technology to help small businesses grow.
FrontFlowFrontFlow is a Swedish tech company that uses AI to make supply chain efficiency child’s play - from orders to invoice handling on autopilot.
FrontwalkerFrontwalker is the consultancy that helps companies and organizations succeed with digital transformation - from strategy to finished solution.
GetingeGetinge saves lives worldwide by creating smart solutions for healthcare - from operating rooms to intensive care units.
Google SwedenGoogle Sweden is the Swedish office of tech giant Google, headquartered in Stockholm and responsible for local partnerships, sales and technical presence in Sweden.
Hedin Mobility GroupHedin Mobility Group is one of Europe's largest mobility providers, operating in 14 countries with over 11,800 employees.
HogiaHogia is a Swedish IT company that develops smart business systems and transport solutions - everything from payroll and finance to real-time data in public transport and logistics.
Humly EdtechHumly Edtech makes it easier to match schools with substitute teachers and educators using smart technology and a commitment to education.
Ica GruppenICA Gruppen is the Swedish retail giant that brings together food, health, and financial services under one roof.
IcomeraIcomera is an expert in connectivity on the move, ensuring passengers have stable internet on trains, buses, and trams worldwide.
Ida InfrontIda Infront creates smart digital solutions that help government agencies and organizations manage information securely, efficiently, and sustainably.
Infor SwedenInfor Sweden is the Swedish branch of Infor - the tech company that develops intelligent business systems for companies around the world.
InvestorInvestor is the investment company that owns and develops some of Sweden’s largest firms. With a long-term approach they foster growth and innovation.
KeyfactorKeyfactor are experts in digital trust - helping companies worldwide manage certificates, encryption and secure digital identities.
KivraKivra is the digital mailbox that makes life easier - gather letters, receipts and invoices in one place while helping the environment.
Kleer GroupKleer Group is a Swedish Finance-as-a-Service provider that combines automated accounting and payroll with financial advisory expertise - especially for SaaS and consulting firms.
KustomKustom is a fast‑growing fintech company offering advanced, customizable checkout solutions for both online and physical retail.
KvaserKvaser develops hardware and software for in-vehicle communication - focusing on CAN networks and solutions for tomorrow’s mobility.
LänsförsäkringarLänsförsäkringar is the hub of a customer‑owned alliance offering banking and insurance services with strong local roots across Sweden.
LegoraLegora is a Stockholm‑based legal‑tech company building AI‑driven workspaces for lawyers that automate the document work and speed up legal workflows.
Lime Technologies SwedenLime Technologies Sweden builds CRM solutions that help companies manage customer relationships - and enjoy the ride along the way.
LitiumLitium is the tech company that helps businesses take their e‑commerce to the next level - fast, smart and scalable.
LKABLKAB is the northern mining giant extracting iron ore while looking toward a greener future powered by innovation.
LumeraLumera develops smart, flexible systems for the pension and life insurance sector - aiming to make pensions simpler and more transparent.
MAG InteractiveMAG Interactive creates mobile games that are as addictive as they are social, with millions of players worldwide.
MicrosoftMicrosoft is the tech giant that has built our operating systems and created a whole world of innovation, gaming and cloud services.
MindlerMindler is a digital psychology service that makes it easy to get professional help for mental health issues - directly on your phone.
Monitor ERP SystemMonitor ERP System helps manufacturing companies gain full control over production, planning and profitability - all within a single ERP system.
MovesticMovestic is an insurance company that helps people build a secure future with smart savings, pension and life insurance solutions.
MSABMSAB is a Swedish company that helps law enforcement agencies around the world analyze data from mobile devices and other digital sources.
MuntersMunters is a Swedish climate solutions company delivering energy-efficient air treatment and climate control systems to industries worldwide.
Nasdaq TechnologyNasdaq Technology AB delivers groundbreaking system solutions that modernize capital markets through a combination of technical expertise and strategic consulting.
NepaNepa helps companies understand their customers better through smart insights and data-driven analysis.
NetcompanyNetcompany helps companies and organizations step into the digital future - quickly, intelligently and with responsibility in focus.
NOBA Bank GroupNOBA Bank Group is a growing specialist banking group from Stockholm helping over two million customers balance their personal finances with savings, loans, cards and mortgages.
NordeaNordea is one of the Nordic region's largest banks, helping both individuals and businesses get their finances in order - and reach their ambitions.
Nordic Forestry AutomationNordic Forestry Automation develops advanced AI and sensor systems for forest machines - aiming to make forestry both smarter and more sustainable.
NovacuraNovacura is the tech company that simplifies business processes with smart software solutions and a healthy dose of innovation.
Objective SolutionsObjective Solutions builds smart software solutions that help airports and airlines take off - literally.
OKQ8OKQ8 is more than just a petrol station - they cover everything from fuel and car care to electric vehicle charging and climate-smart solutions for you and your vehicle.
OptimizelyOptimizely helps companies sharpen their digital experiences with smart tools for content, commerce and experimentation.
Oracle SvenskaOracle Svenska is the Swedish arm of the tech giant Oracle - experts in cloud solutions, databases and AI tools that help businesses grow and become more efficient.
OrtivusOrtivus develops smart digital solutions that save lives by improving pre-hospital care - the care provided before a patient reaches the hospital.
PageroPagero makes the digital business world a bit easier by connecting companies with smart solutions for e-invoicing, e-ordering and regulatory compliance worldwide.
Playground DataPlayground Data is a Stockholm-based consultancy that helps companies turn data into valuable insights through Data and ML engineering in the cloud.
PodMePodMe is the Swedish streaming service that brings podcasts and audiobooks together in one app - with exclusive, ad-free content.
ProffsmagasinetProffsmagasinet is the e-commerce store that makes it easy - and fun - to tackle home and professional projects with a vast assortment, fast deliveries and exceptional service.
ProposalesProposales is the modern, digital way for hotels to create, send and sign business proposals - stylish, smart and mobile-friendly.
Random ForestRandom Forest helps businesses grow through data - from analysis to insight and business value.
RedeployRedeploy is a fresh, passionate consultancy team that helps companies move to the cloud, make smart data-driven decisions and embrace AI - all in a grounded, approachable way.
RillionRillion simplifies financial work by automating supplier invoices with smart AI and streamlined workflows.
SandvikSandvik is a global industrial group delivering innovative solutions in mining, rock excavation and metalworking.
SAP SvenskaSAP Sweden helps companies work smarter through powerful business systems and digital solutions that make everyday operations run smoother.
SavrSavr is the fintech company aiming to shake up the fund market by making saving cheaper and more transparent for everyone.
SBAB BankSBAB is a state-owned digital bank focused on mortgages, savings and open banking via modern APIs.
SchibstedSchibsted is the media group that brings together some of Sweden’s best-known brands in news, marketplaces and digital services.
Schneider Electric SverigeSchneider Electric Sweden helps businesses and communities become smarter, greener and more energy-efficient - with solutions that make a real difference.
SECTRASectra is a Swedish technology company that develops and delivers advanced solutions in medical IT and cybersecurity - with the goal of making societies healthier and safer.
SecuritasSecuritas is the Swedish security company whose three red dots have become a global symbol for safety and surveillance.
SkandikonSkandikon are the specialists in pension administration, helping companies keep track of everything that can otherwise feel like Greek to most people.
SkanskaSkanska is the Swedish construction giant that transforms visions into reality, both at home and around the world.
SolidiconSolidicon creates world‑class digital entertainment - from innovative casino games to smart technical solutions that elevate the player experience.
SpotifySpotify is the Swedish music streaming service that revolutionized how we listen to music, podcasts and other audio content worldwide.
SPPSPP helps companies and individuals make smart choices for pensions and insurance - with sustainability woven through everything.
SSABSSAB is a global leader in high‑strength steel, known for innovative products and a commitment to a fossil‑free future.
StenaStena is a long‑established, family‑owned Swedish conglomerate operating across shipping, property and new business development - with a warm, innovative approach and global reach.
Stillfront GroupStillfront Group is a global games and publishing powerhouse from Stockholm that acquires and grows successful mobile and web studios worldwide.
Stora EnsoStora Enso is the company that transforms trees into everything from packaging and paper to climate‑smart building materials.
Storstockholms LokaltrafikStorstockholms Lokaltrafik (SL) keeps Stockholm moving - from early morning to late evening, in all weather.
Svea BankSvea Bank is not your ordinary bank - it combines a fintech mindset with traditional banking, where innovation and entrepreneurship go hand in hand.
Svensk ExportkreditSvensk Exportkredit (SEK) helps Swedish companies grow globally by providing tailored financing solutions.
Svenska HandelsbankenSvenska Handelsbanken is the bank that believes in long‑term relationships, personal service and empowering local branches to serve customers.
SwecoSweco turns smart ideas into reality by planning and shaping future cities and communities - with sustainability and innovation at the core.
SwedbankSwedbank is a bank that combines long experience with a warm commitment to people and society.
SynsamSynsam is a Nordic optical retail chain that combines vision care with fashion and tech - where you get eye care and stylish frames.
SyntedaSynteda is a dynamic AI company that turns computers into sharp observers using smart algorithms and expert knowledge.
SystematiqSystematiq is a Swedish development company building custom software with expertise in Java, .NET and PHP - always focusing on quality and close collaboration.
TalentiumTalentium helps companies find and recruit top talent faster and smarter with AI support - without getting bogged down in paperwork.
TelavoxTelavox builds smart telephony and collaboration solutions that make it easier for companies to stay connected - with customers and colleagues alike.
Tele2Tele2 delivers fast, effortless connectivity to people and businesses - with a dash of humor and lots of energy.
Telia CompanyTelia Company is a leading Nordic and Baltic telecom operator that connects people and businesses through innovative communication solutions.
Telness TechnologiesTelness Technologies builds software that makes it easy for companies to launch and run mobile operators - fully digital and self-service.
Terna SystemsTerna Systems makes construction sites smarter through machine control that saves time, increases safety and reduces environmental impact - delivered via a flexible subscription.
Tetra PakTetra Pak is the company that keeps your milk, juice and soup fresh longer - using smart packaging technology with care for the planet.
TF BankTF Bank is the bank that likes to keep things simple - smooth digital solutions for loans, savings and payments, without hassle.
TimeEditTimeEdit helps universities worldwide organize schedules, resources and course planning - all in a smooth platform that makes life easier for students and staff.
Toca BocaToca Boca creates digital toys and games that let children explore, create and play with no strict rules.
TrelleborgTrelleborg is a Swedish industrial company that has transformed rubber manufacturing into global polymer solutions - sealing, damping and protecting in demanding environments.
TreydTreyd is a fast‑growing fintech that lets companies pay suppliers later - so they can scale without being tied up by working capital.
TrueSecTrueSec is a Swedish cybersecurity company that prevents breaches and minimizes damage when IT threats strike, with a human and engaged approach.
TrustlyTrustly enables direct payments from bank accounts - fast, smooth and without cards.
Trygg-HansaTrygg‑Hansa is one of Sweden’s best‑known insurance companies, protecting people, animals and belongings with both heart and brains since 1928.
TUI SverigeTUI Sweden takes you from everyday life to dream holidays - with sunshine, adventure and everything in between on the agenda.
UCUC is the company that keeps a close eye on numbers, creditworthiness and business information - helping companies and individuals make smarter decisions.
VästtrafikVästtrafik is the major transport operator for Västra Götaland, ensuring people get around by bus, tram, train and ferry - every day, year round.
VattenfallVattenfall is one of Europe's largest producers and retailers of electricity and heat. They focus heavily on fossil-free energy and aim to drive the transition to a sustainable society.
Visit GroupVisit Group is a technology company for travel and tourism that builds digital ecosystems for experiences and hotels - software for bookings, ticketing, packaging and operational management.
Vitec Software GroupVitec Software Group develops smart software for niche industries - everything from real estate to pharmacies, backed by Swedish engineering.
Vizzit InternationalVizzit International is a Swedish company focused on making websites happier - with analytics and maintenance tools that are simple, secure and user-focused.
Volkswagen Group SverigeVolkswagen Group Sweden is the hub for some of the automotive industry's largest brands and ensures Swedish roads keep moving smoothly and safely.
VolumentalVolumental is a FitTech company that uses AI and 3D foot scanning to make it easy - and fun - to find shoes that truly fit.
Volvo CarsVolvo Cars builds cars that not only take you from A to B but do so with style, safety and a strong dose of innovation.
VolvoVolvo builds trucks, buses and construction equipment that keep the world moving - quite literally.
VoyadoVoyado is the tech company that helps businesses understand, engage and retain customers with smart solutions for personalized marketing and retail experiences.
Wayke SwedenWayke Sweden is the digital marketplace for cars where buyers, sellers and technology meet in a smarter way.
Web Manuals InternationalWeb Manuals International makes it easier for airlines and organizations to keep their manuals digital, up to date and easily accessible.
WintWint is a Swedish fintech company that simplifies running a business by automating financial management for limited companies - accounting, payments, tax returns and year-end reports - with the goal of making accounting simple and even enjoyable.
Wolt SverigeWolt Sweden makes it easy to get the food you love delivered to your door - quickly, conveniently and with a tap.
XensamXensam develops smart software to make license management simple, automated and - believe it or not - a bit more enjoyable.
YouniumYounium is a Swedish SaaS platform that helps B2B companies simplify and automate the entire subscription and billing lifecycle - from quote to cash.
Zalando SwedenZalando Sweden is the Swedish arm of the fashion giant Zalando - a company delivering trendy clothes, shoes and accessories straight to your door.
ZendrZendr makes business shipping simpler, cheaper and smarter through a digital portal where companies can book, compare and manage their transports.
ZymegoZymego makes healthcare smoother by connecting patients with available appointments - quickly, simply and digitally.