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SQL Analytics

Write advanced SQL — window functions, CTEs, and query optimisation.

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After this skill you can…

  • Write window functions (ROW_NUMBER, LAG, LEAD)
  • Build reusable CTEs
  • Explain query plans and add indexes

Prerequisites

Watch (10 videos)

Relational Database Design – Full Course
freeCodeCamp.org · beginner hands-on
→ Write SQL queries→ Optimize database performance
The ORDER BY Statement in SQL : Data Science Code
ritvikmath · intermediate hands-on
→ Sort data using ORDER BY statement→ Analyze data with SQL
MASTER SQL Basics in 1 Video! (From Zero to Pro - Full Course: Syntax, Databases, Real Examples)
Analytics Vidhya · beginner hands-on
→ Write SQL queries→ Manage databases→ Analyze data with SQL
The WHERE Statement in SQL : Data Science Code
ritvikmath · intermediate hands-on
→ Use the WHERE statement to subset data→ Apply SQL for data analysis
1 SQL Server Secrets You Won't Learn in School
Manish Sharma · beginner hands-on
→ Add an IDENTITY COLUMN in SQL Server→ Auto-generate IDs in SQL databases
SQL Tutorial: Creating PostgreSQL Databases
DataCamp · beginner hands-on
→ Create PostgreSQL databases→ Write SQL queries
SQL tutorial 34: How to copy /Insert data into a table from another table using INSERT INTO SELECT
Manish Sharma · beginner hands-on
→ Copy data between tables→ Use INSERT INTO SELECT statement
PL/SQL tutorial 67: PL/SQL Ref Cursors In Oracle Database by Manish Sharma
Manish Sharma · beginner hands-on
→ Use PL/SQL Ref Cursors in Oracle Database→ Manage databases with SQL
SQL Tutorial | Learn How to Insert Data into Tables
365 Data Science · beginner hands-on
→ Insert data into SQL tables→ Manage database scripts
SQL tutorials 17: SQL Primary Key constraint, Drop primary Key
Manish Sharma · beginner hands-on
→ Create a SQL table with primary key→ Drop a primary key constraint

Read (10 articles)

📄
Applying SQL Concepts: DDL, DML, Filtering, and Data Transformation
Dev.to · Sharon-nyabuto · 2026-04-12
📄
Practical SQL Concepts
Dev.to · Alex Waiganjo · 2026-04-12
📄
CTEs, Subqueries, and Query Optimisation in SQL
Dev.to · Joan Wambui · 2026-04-21
📄
Understanding SQL: DDL, DML, and Data Transformation
Dev.to · Victor Karanja · 2026-04-24
📄
Microsoft Data Engineering Interview Questions & Prep
Dev.to · Gowtham Potureddi · 2026-04-27