Online worksheet · 4 of 4

A view should not destroy source records - Online practice 4

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/50 pages; B = nature/10; C = history/60; 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 > 30 with nature OR pages > 30. Filtering makes a view and must preserve the source rows.

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