DB Crossword

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Across
  1. 4. Optimizer part
  2. 6. Database request
  3. 7. Value predictor
  4. 9. Data spread
  5. 10. Information collection
  6. 14. Result size estimate
  7. 15. Misestimation amount
  8. 16. Data subset selection
  9. 19. Data frequency chart
Down
  1. 1. Estimation correctness
  2. 2. Performance evaluation
  3. 3. Execution quality
  4. 5. Plan selector
  5. 8. Data representation
  6. 11. Data combination operation
  7. 12. Execution strategy
  8. 13. Database management
  9. 17. Execution expense
  10. 18. Attribute relationship