kargin-utkin.com

SQL for Data Engineers

Independent skill assessment covering SQL as data engineering screens test it: query fundamentals and NULL semantics, window functions and CTEs, indexing and query performance, aggregation, modeling and DDL, transactions and isolation, and where PostgreSQL, MySQL, BigQuery and Snowflake diverge. Written and maintained here — not a credential. Free for registered users.

200
practice questions
7
topics
70%
pass mark
65
mock exam length
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Topics covered

Query fundamentals & NULL semantics
20%40 q
Window functions & CTEs
18%36 q
Indexing & query performance
15%30 q
Dialect differences
13%26 q
Aggregation & grouping
12%24 q
Data modeling & DDL
12%24 q
Transactions & isolation
10%20 q

Practice scores from kargin-utkin.com. Not affiliated with kargin-utkin.com. Real exam details may differ - always verify with the official source.