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campo - Grupo Alarcos - Universidad de Castilla-La Mancha

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Conceptos (ii)<br />

! Cada <strong>campo</strong> tiene una serie <strong>de</strong> propieda<strong>de</strong>s:<br />

– Nombre.<br />

– Tipo <strong>de</strong> Dato: : tipo <strong>de</strong> valores que pue<strong>de</strong> tener.<br />

» Entero, Fecha, Texto, ...<br />

– Valor por <strong>de</strong>fecto (pre<strong>de</strong>terminado).<br />

– Requerido (SI=> no admite valores nulos).<br />

– In<strong>de</strong>xado (SI => forma un índice <strong>de</strong><br />

or<strong>de</strong>nación-búsqueda).<br />

UCLM - F.Ruiz 11

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