Ujjwal Tyagi’s Post

Day 67 of my Data Engineering journey 🚀 Today I worked with Spark SQL combining the simplicity of SQL with the power of distributed processing. 📘 What I learned today (Spark SQL with Apache Spark): • Creating temporary views from DataFrames • Running SQL queries on large datasets • Using spark.sql() for querying • Performing joins and aggregations using SQL • Comparing DataFrame API vs SQL approach • Writing cleaner and more readable queries • Leveraging SQL knowledge in Big Data systems • Choosing between SQL and DataFrame transformations Spark SQL makes it easier to work with data using familiar SQL syntax even at scale. Instead of writing complex code, you can express logic in simple SQL queries. Best part? It runs on distributed systems. SQL + Spark = powerful combination. Why I’m learning in public: • To stay consistent • To build accountability • To improve daily Day 67 done ✅ Next up: working with different file formats (Parquet, JSON, CSV) in Spark 💪 #DataEngineering #BigData #ApacheSpark #SQL #Python #LearningInPublic #CareerGrowth #Consistency

DAY 137 – DATA SCIENCE JOURNEY: SQL FUNDAMENTALS & DATABASE OPERATIONS Today, I focused on understanding how databases work behind the scenes by practicing SQL on a Student Database. WHAT I LEARNED ▪ Creating Tables Designed structured tables using CREATE TABLE with proper data types and primary keys. ▪ Inserting Data Used INSERT INTO to add records and understand row-based data storage. ▪ Querying Data Practiced SELECT queries with conditions (WHERE, >, <, =) to extract meaningful insights. ▪ Updating Records Applied UPDATE to modify specific data based on conditions. ▪ Deleting Data Learned to remove records safely using DELETE with filters. ▪ Altering Tables Worked with ALTER TABLE to add, modify, and remove columns. KEY TAKEAWAY SQL is not just about writing queries — it is about thinking logically and managing data efficiently. Each command (CREATE, INSERT, SELECT, UPDATE, DELETE, ALTER) is a fundamental building block for Data Science. NEXT STEP Joins and Advanced Queries #Day137 #DataScienceJourney #SQL #LearningInPublic #Database #Python #GrowthMindset #FutureDataScientist

Clean queries. Clear insights. That’s the power of mastering basic SQL commands. #SQL #DataScience #DataAnalytics #ProgrammingLife #LearnSQL #TechCareer #Analytics #Database #Coding #Growth #DataEngineering #BigData #DataVisualization #BusinessIntelligence #TechSkills #CodingJourney #DeveloperLife #DataDriven #Upskilling #CareerGrowth #DataTools #Querying #DataManagement #SoftwareDevelopment #ITSkills #DigitalSkills #LearningEveryday #TechCommunity #AnalyticsLife #FutureSkills

📅 Day 23/30 — Databases & SQL Basics for Data Science Kicking off my database adventure on this 30-day data science journey! Today, I dove into the world of structured data storage and why it's a game-changer for handling real-world datasets. What I worked on today: 🗄️ Explored databases and their crucial role in data science—like efficient storage, querying, and scalability for massive datasets 💻 Got hands-on with SQL: Installed MySQL on my system 🛠️ Created my first database and tables to organize data like a pro This foundational step feels powerful—now I can store and retrieve data systematically before analyzing it! ➡️ Next step: SQL Queries & Data Manipulation #LearningInPublic #Python #DataScience #Anaconda #JupyterNotebook #SQL #MySQL #Databases #30DaysOfLearning #ProgrammingJourney

Most SQL developers know the basics. The top 1% know how to use SQL to answer questions a business actually cares about. 🎯 𝐇𝐞𝐫𝐞'𝐬 𝐲𝐨𝐮𝐫 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐒𝐐𝐋 𝐂𝐡𝐞𝐚𝐭𝐬𝐡𝐞𝐞𝐭 — 𝐭𝐡𝐞 𝐜𝐨𝐧𝐜𝐞𝐩𝐭𝐬 𝐭𝐡𝐚𝐭 𝐬𝐞𝐩𝐚𝐫𝐚𝐭𝐞 𝐠𝐨𝐨𝐝 𝐚𝐧𝐚𝐥𝐲𝐬𝐭𝐬 𝐟𝐫𝐨𝐦 𝐠𝐫𝐞𝐚𝐭 𝐨𝐧𝐞𝐬: ✅ Recursive CTEs — traverse hierarchies, org charts & category trees ✅ NTILE & PERCENT_RANK — rank and bucket your data like a pro ✅ ROWS BETWEEN — build sliding averages for any time window ✅ FIRST_VALUE — compare every row against the group's best ✅ Gaps & Islands — detect streaks and missing sequences in data ✅ Conditional Aggregation — pivot data without a PIVOT function Save this. You WILL need it. 💾 ♻️ Repost to help someone in your network level up their SQL. 📌 Follow Navya sri Kurapati🧑💻 for daily SQL, Python & Data content 🔗 Book a 1:1 mentorship session → https://lnkd.in/gfqXGEnq #SQL #AdvancedSQL #SQLTips #DataAnalytics #DataScience #DataEngineering #WindowFunctions #CTE #LearnSQL #DataAnalyst #TechCareer #SQLServer #Analytics #CareerGrowth #NavyaSriKurapati

Struggling with advanced SQL? 🤔 Start learning Subqueries — one of the most powerful concepts in SQL 💻📊 A subquery lets you use one query inside another, making complex data analysis easier and smarter. 💡 Want to level up your SQL skills? This is a must-learn! 💬 Have you tried subqueries before? Comment “YES” or “NO” #SQL #Subquery #LearnSQL #DataAnalytics #DataScience #Database #TechSkills #Upskill #DataAnalyst #Coding #Programming #Students #CareerGrowth #Analytics #LearnTech #NattonTechnologies #NattonAI #NattonDigital #NattonSkillX

Struggling with advanced SQL? 🤔 Start learning Subqueries — one of the most powerful concepts in SQL 💻📊 A subquery lets you use one query inside another, making complex data analysis easier and smarter. 💡 Want to level up your SQL skills? This is a must-learn! 💬 Have you tried subqueries before? Comment “YES” or “NO” #SQL #Subquery #LearnSQL #DataAnalytics #DataScience #Database #TechSkills #Upskill #DataAnalyst #Coding #Programming #Students #CareerGrowth #Analytics #LearnTech #NattonTechnologies #NattonAI #NattonDigital #NattonSkillX

Struggling with advanced SQL? 🤔 Start learning Subqueries — one of the most powerful concepts in SQL 💻📊 A subquery lets you use one query inside another, making complex data analysis easier and smarter. 💡 Want to level up your SQL skills? This is a must-learn! 💬 Have you tried subqueries before? Comment “YES” or “NO” #SQL #Subquery #LearnSQL #DataAnalytics #DataScience #Database #TechSkills #Upskill #DataAnalyst #Coding #Programming #Students #CareerGrowth #Analytics #LearnTech #NattonTechnologies #NattonAI #NattonDigital #NattonSkillX

Struggling with advanced SQL? 🤔 Start learning Subqueries — one of the most powerful concepts in SQL 💻📊 A subquery lets you use one query inside another, making complex data analysis easier and smarter. 💡 Want to level up your SQL skills? This is a must-learn! 💬 Have you tried subqueries before? Comment “YES” or “NO” #SQL #Subquery #LearnSQL #DataAnalytics #DataScience #Database #TechSkills #Upskill #DataAnalyst #Coding #Programming #Students #CareerGrowth #Analytics #LearnTech #NattonTechnologies #NattonAI #NattonDigital #NattonSkillX

Mastering SQL from Beginner to Advanced in one structured roadmap! � Covered key concepts like Joins, Subqueries, CTEs, Window Functions, Indexing, Query Optimization, Transactions, ACID, Stored Procedures, Triggers, and Real-Time SQL Scenarios. Perfect for Data Analytics, SQL Interviews, DBMS revision, and placement prep 💡 Consistency + daily learning = growth 📈 Follow Rishabh Singh for more daily learning content on SQL, Excel, Python & Data Analytics. #SQL #DataAnalytics #DBMS #LearningJourney #SQLInterviewQuestions #QueryOptimization #WindowFunctions #CTE #DataScience #CareerGrowth #Students #TechLearning