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A view should not destroy source records - Paper 1
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Fictional rows: A = nature/100 pages; B = nature/50; C = history/110; D = nature/page count missing. Rule: an unknown page count does NOT satisfy a pages-greater-than test; do not replace it with zero. Compare nature AND pages > 70 with nature OR pages > 70. Filtering makes a view and must preserve the source rows.
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