BASE DE DATOS

Base de Datos
https://elbauldelprogramador.com/lenguaje-definicion-de-datosddl-create/


http://www.cyta.com.ar/biblioteca/bddoc/bdlibros/proyectoinformatico/libro/c3/c3.htm


https://es.slideshare.net/senaticscesar/bases-de-datos-conceptos-basicos?from_action=save


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