Technical · Structured skill path
SQL Track Assessment & Practice
Structured SQL assessment progression from foundations through advanced problem solving.
20 progressive levels · Beginner → advanced · 400 published questions
Start with the FREE entry level. PRO levels remain gated and unlock in sequence after sign-in.
Level 1
SQL Foundations
SQL Foundations Assessment
beginner · 20 published questions
Level 2
SELECT Statements & Expressions
SQL SELECT and Expressions Assessment
beginner · 20 published questions
Level 3
Filtering with WHERE
SQL Filtering Assessment
beginner · 20 published questions
Level 4
Sorting, DISTINCT & Limiting
SQL Sorting and Limiting Assessment
beginner · 20 published questions
Level 5
NULL Handling & Basic Functions
SQL NULL Handling and Functions Assessment
beginner · 20 published questions
Level 6
Aggregate Functions
SQL Aggregate Functions Assessment
beginner · 20 published questions
Level 7
GROUP BY & HAVING
SQL Grouping and HAVING Assessment
intermediate · 20 published questions
Level 8
INNER JOIN Fundamentals
SQL INNER JOIN Assessment
intermediate · 20 published questions
Level 9
Outer, Cross & Self Joins
SQL Advanced Joins Assessment
intermediate · 20 published questions
Level 10
Subqueries
SQL Subqueries Assessment
intermediate · 20 published questions
Level 11
Common Table Expressions
SQL CTE Assessment
intermediate · 20 published questions
Level 12
UNION & Set Operations
SQL Set Operations Assessment
intermediate · 20 published questions
Level 13
CASE & Conditional Logic
SQL Conditional Logic Assessment
intermediate · 20 published questions
Level 14
String, Date & Conversion Functions
SQL Built-in Functions Assessment
intermediate · 20 published questions
Level 15
Window Functions Fundamentals
SQL Window Functions Fundamentals Assessment
advanced · 20 published questions
Level 16
Advanced Window Functions
SQL Advanced Window Functions Assessment
advanced · 20 published questions
Level 17
INSERT, UPDATE, DELETE & MERGE
SQL Data Manipulation Assessment
advanced · 20 published questions
Level 18
Tables, Keys, Constraints & Normalization
SQL Database Design Assessment
advanced · 20 published questions
Level 19
Indexes & Query Performance
SQL Performance Optimization Assessment
advanced · 20 published questions
Level 20
Advanced SQL Problem Solving
Advanced SQL Problem Solving Assessment
advanced · 20 published questions