Oracle PL/SQL and Database Concepts

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Multiple Choice

Which column is more skewed? Total no. of rows in the table are 1000

  1. Deptno column has 5 distinct values, each having 200 rows
  2. Grade column has 2 distinct values having 1 and 999 rows
  3. Location column has 3 distinct values having 300, 400 and 300 rows
  4. All columns have same skewness
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