Real questions from top companies in SQL
NoSQL Database - Cassandra fundamentals
Normalization & Slowly Changing Dimensions (SCD) Type 2
Normalization vs Denormalization
Normalization: 1NF, 2NF, 3NF with examples
Normalization: Concepts and its importance
Normalization: Various forms and impact on query performance
Number of Rows in Different Joins
Oozie join condition?
Optimization Techniques Beyond Repartitioning and Caching
Optimization techniques - partitioning, caching, broadcast joins, bucketing
Optimization: Performance tuning strategies and temporal tables
Optimize SQL using indexing and partitioning filters.
Optimize a query fetching customer data with a rolling 6-month sales sum.
Optimize a slow SQL query for a large orders table containing billions of rows.
Optimizing Spark Jobs when they take longer than expected
PIVOT Operator in T-SQL
Partitioning a table with card details and transactions?
Predict the output of SQL joins (INNER, LEFT, RIGHT) on dataset containing 0, NULL, and 1
Predicted outputs for different join types using two sample tables with NULL values.
Print only the newest record for each name – Use SQL Window functions (ROW_NUMBER, RANK, etc.)
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