Topic Assessments•3 Quizzes Available
SQL Quizzes
Index traversal, EXPLAIN plans, composite column ordering, joins & query optimization.
3Free
0Pro
30Questions
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Available SQL Assessments
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FreeIntermediate
SQL Indexing & Query Tuning
Master B-Tree index traversal, composite index column ordering, EXPLAIN plans, and index selectivity.
10 Questions
15 mins
FreeIntermediate
SQL Transactions & ACID Isolation
Understand Atomicity, Consistency, Isolation levels, dirty reads, non-repeatable reads, phantom reads, and MVCC.
10 Questions
15 mins
FreeBeginner
SQL Joins, Aggregations & Window Functions
Master INNER/LEFT/FULL joins, GROUP BY, HAVING filters, ROW_NUMBER(), RANK(), and partition aggregation.
10 Questions
15 mins