PySpark Pivot, Unpivot & Rollup

5 interview problems on pivot, unpivot, rollup, cube and grouping sets, from easy to hard.

• Pivot Quarterly Revenue · Medium · Pivot, Unpivot & Rollup
• Unpivot Wide Columns to Rows · Medium · Pivot, Unpivot & Rollup
• Subtotals with ROLLUP · Hard · Pivot, Unpivot & Rollup
• All Combinations with CUBE · Hard · Pivot, Unpivot & Rollup
• Pivot with Several Aggregations · Hard · Pivot, Unpivot & Rollup

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Topics: Window Functions · Joins · Aggregations · Pivot, Unpivot & Rollup · Arrays · Null Handling · Conditional Logic · Dates · Filtering & Selection · Strings

Difficulty: Easy · Medium · Hard · PySpark interview roadmap · All problems