Tutorial
Hands-on walkthroughs for SQL, Python, Excel and visualisation tools — every example is runnable, not a screenshot.
109 articles in Tutorial · Page 4 of 13
OFFSET in SQL: Syntax, Pagination & Performance Optimization
Master OFFSET in SQL for database pagination. Learn LIMIT/OFFSET syntax across dialects, deep pagination performance pitfalls, and keyset seek methods.
Order of Execution in SQL: The 8 Stages Every Analyst Must Understand
Master the order of execution in sql: learn how databases process FROM, WHERE, GROUP BY, HAVING, and SELECT clauses, and resolve query alias errors.
Percentage Formula in Excel: Growth, Totals, and Changes (with Examples)
Master the percentage formula in excel: calculate percentage of total, percentage change, markup, and discounts with practical formulas and error fixes.
PMT Formula in Excel: Calculate Loan EMIs and Payments (Examples)
PMT formula in Excel explained: compute EMIs with =PMT(rate, nper, pv). Loan examples, rate conversions, total-interest math, and analyst mistakes to avoid.
Python for Data Analysis: The Complete Workflow Playbook (2026)
Master python data analysis with this complete playbook: pandas wrangling, exploratory data analysis, statistical cohorts, and production data pipelines.
Python Tutorial: The Complete Guide for Data Analysts (2026)
Master Python programming with this comprehensive python tutorial for data analysts: variables, data structures, control flow, functions, NumPy, Pandas, and real-world projects.
RANK Formula in Excel: Rank Sales, Scores, and KPIs (with Examples)
Rank formula in Excel explained: use RANK, RANK.EQ, and RANK.AVG to rank sales, scores, and KPIs. Syntax, examples, ties, and fixes analysts need daily.
SEQUENCE Formula in Excel: Auto-Numbering and Date Series (Guide)
SEQUENCE formula in Excel explained: =SEQUENCE(rows, columns, start, step) for IDs, date series, and dynamic grids. Spill fixes and analyst examples included.
Set Operators in SQL: UNION, UNION ALL, INTERSECT & EXCEPT Guide
Master set operators in SQL with practical examples of UNION, UNION ALL, INTERSECT, and EXCEPT/MINUS to combine query result sets effectively.