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Python Programming Learning Circle
Python Programming Learning Circle
Jul 20, 2022 · Databases

10 Essential SQL Concepts for Interview Preparation

This article presents ten core SQL techniques—including CTEs, recursive CTEs, temporary functions, CASE WHEN pivots, EXCEPT vs NOT IN, self‑joins, ranking window functions, delta calculations, cumulative sums, and date‑time manipulation—each explained with clear descriptions and practical query examples to help candidates ace data‑analysis interviews.

CASE WHENCTESQL
0 likes · 11 min read
10 Essential SQL Concepts for Interview Preparation
dbaplus Community
dbaplus Community
Jun 28, 2022 · Databases

Master 10 Advanced SQL Concepts Every Data Scientist Should Know

This article presents ten essential advanced SQL techniques—including CTEs, recursive CTEs, temporary functions, CASE‑WHEN pivots, EXCEPT vs NOT IN, self‑joins, ranking windows, delta calculations, cumulative totals, and date‑time manipulation—each explained with clear examples and code snippets for interview preparation.

CASE WHENCTEData Science Interviews
0 likes · 11 min read
Master 10 Advanced SQL Concepts Every Data Scientist Should Know
Java Captain
Java Captain
Aug 7, 2019 · Databases

Practical Guide to Group, Join, and CASE WHEN Queries in SQL

This article provides a beginner‑friendly, step‑by‑step tutorial on common SQL operations—including GROUP BY aggregation, JOIN types, CASE WHEN expressions, and useful built‑in functions—illustrated with clear examples, typical pitfalls, and ready‑to‑use code snippets.

CASE WHENDatabase tutorialGROUP BY
0 likes · 10 min read
Practical Guide to Group, Join, and CASE WHEN Queries in SQL