15 lines
264 B
SQL
15 lines
264 B
SQL
SELECT MAX(age) as oldest_donor
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FROM donor
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WHERE donor_id IN (
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SELECT donor_id
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FROM operation
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WHERE unit_id IN (
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SELECT unit_id
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FROM transplant_unit
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WHERE hospital_id IN (
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SELECT hospital_id
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FROM hospital
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WHERE city LIKE '%Manchester%'
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)
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)
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); |