Data Analytics SQL interview questions and answers for 2027: from basics to joins SQL interview questions and answers: 20 questions on joins, aggregation, CTEs and window functions, each run on SQLite 3.54.0 with the real output shown.
Data Analytics Data engineer roadmap for 2027: SQL, pipelines and the cloud A data engineer roadmap for 2027 in nine stages, from SQL and Python to Airflow, dbt and Kafka, with a DuckDB pipeline tested on Python 3.12.
Data Analytics Best BI and dashboard tools in 2027: Power BI, Tableau, free ones Best BI tools as of 11 November 2026: Power BI, Tableau, Data Studio (formerly Looker Studio), Metabase and six more, with free routes and one limit each.
Data Analytics Best Python libraries for data analysis in 2027: pandas to DuckDB Python libraries for data analysis as of 11 November 2026: pandas 3.1.1, Polars 2.1.0, DuckDB 2.0.0 and seven more, with install lines and tested code.
Data Analytics Excel formulas every professional should know: XLOOKUP, SUMIFS 15 Excel formulas by job, from XLOOKUP and SUMIFS to FILTER and LET, with syntax, a worked example and the Excel versions that have each one.
Data Analytics MongoDB vs MySQL: differences, use cases and how to choose MongoDB vs MySQL compared on data model, schema, joins, transactions and scaling, with 3 orders modelled both ways and a decision guide by use case.
Data Analytics What is ETL? Data pipelines explained for beginners What is ETL? Extract, transform, load explained with a 5-row pipeline run in Python, ETL vs ELT, batch vs streaming and the tools in the category.
Data Analytics Data analyst roadmap for 2027: skills, tools and projects in order Data analyst roadmap for 2027 in seven stages: Excel and statistics, SQL, BI, Python, storytelling, domain and portfolio, each with a project and a proof.
Data Analytics A/B testing explained: how analysts and product teams run experiments A/B testing explained for analysts: the six steps, a sample size of 3,839 visitors per variant for a 10% to 12% lift, p-values, and the peeking trap.
Data Analytics Data cleaning techniques in Excel, SQL and Python Data cleaning techniques in Excel, SQL and Python: a seven-step order, one messy 6-row table cleaned two ways, and when not to delete values or outliers.
Data Analytics SQL window functions explained: ROW_NUMBER, RANK, LAG, running totals SQL window functions explained with result tables: ROW_NUMBER, RANK and DENSE_RANK on a 45-unit tie, LAG, LEAD, running totals and the default frame trap.
Data Analytics SQL joins explained with examples: inner, left, right and full SQL joins explained with examples: inner, left, right and full joins return 3, 4, 4 and 5 rows on two small tables, plus a MySQL FULL JOIN substitute.
Data Analytics Learn Analytics with AI While Working Full-Time: A 6-Month, 8-10 Hours a Week Plan A realistic weekly plan for learning analytics and AI while you work, the skills to learn first, and a walkthrough of Analytics with Agentic AI, the 6-month live online program from Vishlesan i-Hub Foundation, IIT Patna, with three tracks.
Data Analytics Is a data analytics certification worth it, or should you self-learn? Is a data analytics certification worth it? 40% of employers prefer demonstrable AI skills or certifications over a degree, per NASSCOM and Indeed in 2026.
Data Analytics Data analytics vs AI ML career choice for a CSE final-year student Data analytics vs AI ML for CSE final-year students: Naukri's September 2026 data had AI/ML roles up 20% against 2% overall. Openings, entry bar and pay.
Data Analytics Career switch to data analytics from a non-tech job in India Career switch to data analytics from a non-tech job in India: 30% of employers expect to drop degree requirements, per WEF. What the 2026 hiring data says.
Data Analytics Generative AI skills for data analysts that job postings now ask for Generative AI skills for data analysts: 40% of Indian analytics postings referenced AI in January 2026. The skills hiring data names, and what comes first.
Data Analytics Will AI replace data analysts? What 2026 enterprise data says Will AI replace data analysts? NASSCOM's October 2026 survey of 200 Indian firms found 78% limit AI agents to structured tasks. What changes for analysts.
Data Analytics Data analyst career path after three years in the role Data analyst career path after three years: foundit's June 2026 tracker shows demand down 10% for 4-6 years and up 6% for 7-10 years. Four routes compared.
Data Analytics Data literacy for managers who have to lead with analytics in 2026 Data literacy for managers: WEF found 79% of employers in India list analytical thinking as a core skill. What to learn first, and what to skip.
Data Analytics Can a commerce student become a data analyst in India? Can a commerce student become a data analyst in India? WEF found 30% of employers there expect to drop degree requirements. Skills, internships and pay.
Data Analytics SQL vs Python for data analysts and which to learn first SQL vs Python for data analysts: foundit's December 2025 tracker ranks Python at 22% and SQL at 18% for 0-3 years. Which to learn first, and how deep.
Data Analytics Data analyst demand in India in 2026 by sector, GCC and city Data analyst demand in India in 2026: Naukri's September 2026 JobSpeak had GCC hiring up 4% and Hyderabad up 23%, while foundit saw vacancies 9% lower.
Masai School Placements Is Masai School Worth It in 2026? An Honest Review An honest review of Masai School in 2026: what it sells today, who each programme suits, who should skip it, what its placement claims do and do not tell you, and what to check before you pay.
Data Analytics Data Science Certifications: Enhancing Your Skills and Marketability Your career in data science and machine learning may get off to a strong start with the help of the Data Science course. Through a demanding curriculum taught by professionals in the field who will mentor you as you advance in your career, you will be industry-ready.
