Saya bermula tanpa pengetahuan langsung tentang pangkalan data, tetapi kini boleh menulis query yang agak rumit dengan yakin. Bahagian tentang JOIN antara beberapa jadual akhirnya membuatkan semuanya masuk akal bagi saya. Latihan menulis query untuk menarik insight daripada data sebenar sangat membantu. Saya juga belajar menulis query yang lebih cekap supaya laporan keluar lebih pantas. Ini benar-benar memberi saya asas kukuh untuk kerjaya sebagai penganalisis data.
SQL Foundations for Aspiring Data Analysts
Learn to write efficient queries, extract insights from relational databases, and build the essential skills needed for a career in data analysis.
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About this course
Data is the driving force behind modern business decisions, and SQL is the essential language used to unlock its value. This course takes you from absolute beginner to confidently querying and analyzing relational databases. You will develop the foundational skills required to extract, filter, and aggregate data to answer real-world business questions. What you'll learn: - Understand core relational database concepts and essential SQL terminology. - Write fundamental SQL queries to retrieve, filter, and sort data efficiently. - Apply data aggregation techniques to summarize large datasets. - Master table joins to combine data from multiple sources. - Practice using Common Table Expressions (CTEs) for readable, modern query structuring. - Explore basic window functions to perform advanced analytical calculations. The curriculum begins with fundamental database definitions and gradually introduces more complex querying techniques through written explanations and practical code snippets. You will progress logically from basic SELECT statements to modern analytical functions. Designed for complete beginners, aspiring data analysts, and professionals looking to transition into data-driven roles with no prior programming experience required. Start your data analysis journey today by mastering the language of databases.
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Reviews (7)
Nunca tinha escrito uma query antes e no fim do curso já estava fazendo joins e agregações com confiança para tirar insights reais de um banco de dados.
Materi query dan JOIN jelas banget, cuma pengen contoh database yang lebih besar buat latihan.
Buena introducción a SQL, explica joins y agregaciones con ejemplos claros, aunque me hubiera gustado más práctica con bases de datos más grandes.
Endlich verstehe ich JOINs und Aggregationen wirklich, das Schreiben sauberer Abfragen fällt mir jetzt leicht.
Ich hatte vorher noch nie mit SQL gearbeitet und war überrascht, wie schnell die Grundlagen wirklich sitzen. Der Kurs beginnt mit einfachen SELECT-Abfragen und arbeitet sich Schritt für Schritt zu Joins und Aggregationen vor, ohne dass man sich je überfordert fühlt. Besonders hilfreich fand ich, dass jede Übung mit einer relationalen Beispieldatenbank arbeitet, die realistisch genug ist, um echte Analystenaufgaben nachzustellen. Die Erklärungen zu GROUP BY und den verschiedenen Join-Typen waren so klar, dass ich zum ersten Mal wirklich verstanden habe, warum man welchen Join wann benutzt. Am Ende konnte ich eigenständig Abfragen schreiben, um konkrete Fragen aus mehreren verknüpften Tabellen zu beantworten, was für mich ein echter Wendepunkt war.
এর আগে আমি কখনো SQL লিখিনি, তাই কোর্সটা শুরু করার আগে একটু দ্বিধায় ছিলাম। কিন্তু একদম সহজ SELECT স্টেটমেন্ট থেকে শুরু করে ধীরে ধীরে জয়েন আর অ্যাগ্রিগেশন পর্যন্ত নিয়ে যাওয়া হয়েছে, যাতে কোথাও হারিয়ে না যাই। প্রতিটা অনুশীলনে একটা বাস্তবসম্মত রিলেশনাল ডেটাবেস ব্যবহার করা হয়েছে, যা সত্যিকারের ডেটা অ্যানালিস্টের কাজের মতোই লাগে। GROUP BY আর বিভিন্ন ধরনের জয়েনের ব্যাখ্যা এত পরিষ্কার ছিল যে প্রথমবার সত্যিই বুঝতে পারলাম কখন কোনটা ব্যবহার করতে হয়। কোর্স শেষে নিজে থেকে একাধিক টেবিল জুড়ে কোয়েরি লিখে উত্তর বের করতে পারছি, যেটা আমার কাছে বড় একটা অর্জন।
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