HW7 ‐ Preparing for a SQL Screening Interview - yentingw-gin/BIDD330_Spring2025_Reporting GitHub Wiki

SQL is a core skill for data professionals. If you are interviewing for a data-relative position, make sure you're confident in the following areas:

1. Core Commands: Know SELECT, WHERE, GROUP BY, JOIN, and ORDER BY. Practice filtering and aggregating data.

2. Joins: Master different join types and apply them to real-world scenarios.

3. Window Functions: Be familiar with functions such as ROW_NUMBER() and LAG() for tasks like ranking and trend analysis.

4. CTEs/Subqueries: Break down complex logic using Common Table Expressions and nested queries.

5. Hands-On Practice: Try coding challenges on LeetCode, or HackerRank to build speed and confidence.