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MySQL aún es gratis pero es un producto de Oracle en la actualidad. \nAmbos motores de bases de datos fueron construidos por Michael Widenius (Alias Monty).\n\n-----------------\n\n## Diagramas de relaciones conceptuales vs Diagramas de relaciones físicos\n\nEl **Diagrama Entidad Relación** se divide en dos tipos:\n\n1. **Diagrama Conceptual**: Nos permite tener una visión general de lo que se quiere construir de una manera no detallada, por ejemplo, la relación de una entidad con otras entidades.\n\nSimbología: \n\n\u003cimg src=\"./images/simbologia_diagrama_conceptual.PNG\"\u003e\n\nVeamos un ejemplo:\n\n\u003cimg src=\"./images/ejemplo_conceptual.PNG\"\u003e\n\n2. **Diagrama Físico**: Es un diagrama más detallado, incluye relaciones, tipo de relaciones, tablas, columnas, tipos de datos, entre otros. Nos permite tener en detalle toda la descripción de la base de datos.\n\nSimbología:\n\n\u003cimg src=\"./images/simbologia_diagrama_fisico.PNG\"\u003e\n\nAsí es como expresamos relaciones en un diagrama físico: \n\n\u003cimg src=\"./images/relaciones_fisico.PNG\"\u003e\n\nVeamos un ejemplo entonces de un diagrama físico: \n\n\u003cimg src=\"./images/fisico_ejemplo.PNG\"\u003e\n\n**¿Donde podemos armar nuestros diagramas?**\n\nhttps://www.drawio.com/\n\nTambién existe un plugin para VSC que nos permite armar nuestros diagramas directamente en nuestro editor con archivos \".drawio\"\n\nSe ve algo así: \n\n\u003cimg src=\"./images/plugin_drawio.PNG\"\u003e\n\n**¿Donde podemos encontrar mas detalles sombre la simbología de nuestros diagramas entidad-relación?**\n\nhttps://www.lucidchart.com/pages/es/simbolos-de-diagramas-entidad-relacion\n\nEl Diagrama Entidad Relación tambien es conocido como:\n\n1. Diagrama ER\n2. Diagrama E-R\n3. ERD.\n\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmgobeaalcoba%2Fdatabases_mysql_mariadb","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmgobeaalcoba%2Fdatabases_mysql_mariadb","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmgobeaalcoba%2Fdatabases_mysql_mariadb/lists"}