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INFORMATICA MEDICA

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Subquery scalari (2)<br />

• Condizioni di uso<br />

• Deve restituire un solo valore<br />

• Deve comparire a destra dell’operatore di<br />

confronto<br />

• Non si possono confrontare due subquery<br />

• Nella subquery non si possono usare<br />

(GROUP BY e HAVING)<br />

Inf. Med.- 3. Panoramica su SQL -<br />

A.A. 2013-14

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