Assessment
SQL Assessment Test
Evaluate SQL skills with AI-powered assessment tests for hiring. Covers queries, joins, aggregations, subqueries, and database design fundamentals.
The short answer
A sql assessment test typically runs 30-40 minutes and uses query writing, query debugging, output prediction, schema design and multiple choice, set at 3 difficulty levels. It is scored on the areas below, so knowing what is measured is most of the preparation.
- SELECT statements, filtering, and sorting
- JOIN types (INNER, LEFT, RIGHT, FULL, CROSS)
- Aggregation functions (GROUP BY, HAVING, COUNT, SUM, AVG)
- Subqueries and common table expressions (CTEs)
Five free practice assessments a month with a scored report. No card required.
A SQL Assessment Test evaluates a candidate's ability to write queries, manipulate data, and work with relational databases. SQL is a foundational skill for Data Analysts, Data Engineers, Backend Developers, and Business Intelligence professionals. This assessment helps employers identify candidates who can efficiently extract insights from databases and work with complex data relationships.
Format
What it measures
- SELECT statements, filtering, and sorting
- JOIN types (INNER, LEFT, RIGHT, FULL, CROSS)
- Aggregation functions (GROUP BY, HAVING, COUNT, SUM, AVG)
- Subqueries and common table expressions (CTEs)
- Window functions (ROW_NUMBER, RANK, LAG, LEAD)
- Data manipulation (INSERT, UPDATE, DELETE)
- Database design and normalization concepts
- Query optimization and indexing basics
Cohesyve
Run a sql assessment test on your own candidates
Paste a job description and Cohesyve generates a role-specific version, with a scoring rubric. Each candidate gets different questions, so nothing can be shared.
Who takes it
Topics covered
Basic Queries
- SELECT and WHERE clauses
- ORDER BY and LIMIT
- String functions
- Date functions
- NULL handling
Joins & Relationships
- Multi-table JOINs
- Self-joins
- Cross joins
- Join conditions
- Handling many-to-many
Aggregation
- GROUP BY with HAVING
- Multiple aggregations
- Conditional aggregation
- Nested aggregations
- Running totals
Advanced
- Window functions
- CTEs and recursive queries
- Query performance
- Index optimization
- Transaction concepts
Why it is used
For employers
- Validate SQL proficiency before investing interview time
- Assess real query-writing ability, not just theoretical knowledge
- Compare candidates objectively on a standardized assessment
- AI-generated unique questions prevent candidates from sharing answers
- Receive detailed skill breakdowns across SQL competency areas
For candidates
- Demonstrate practical SQL skills beyond resume keywords
- Complete the assessment quickly (30-40 minutes)
- Receive a fair evaluation with role-appropriate difficulty
- Differentiate yourself with verified technical skills
Common questions
Which SQL dialect does the assessment use?
The assessment uses standard ANSI SQL, which is compatible with all major databases (PostgreSQL, MySQL, SQL Server, Oracle). Questions focus on universal SQL concepts rather than dialect-specific syntax.
Do candidates need access to a database to take the test?
No, the assessment is taken entirely through Cohesyve's online platform. Questions include interactive query exercises, output prediction, and debugging scenarios that test real SQL skills without requiring a local database setup.
How do you prevent candidates from using AI to answer SQL questions?
Cohesyve generates unique, context-specific questions for every candidate. The assessment includes practical scenarios and debugging exercises that require genuine understanding rather than pattern matching. Timed assessments and question variation make AI assistance impractical.
Cohesyve · Practice for candidates
Practise a sql assessment test before the real one
Run the same kind of AI-scored assessment, get a report on where you lost marks, and go in knowing what to expect.
5
free assessments a month
$0
no card required
Full
scored report every run
Every
question type included
5 free assessments a month · No card required · Pro from $16/mo
For hiring teams
Hiring for this rather than applying? Cohesyve builds a role-specific assessment for candidates from your job description, with the rubric to score it.
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