auxiliary files deleted, readme actualized

Author: InMentals

README.md

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-# Exercise_Modelado_de_datos_SQL
-This repository contains the exercise for the module "Modelado de datos e introduccion a SQL" of the KeepCoding bootcamp "Desarrollo Web | Edición XVII"I.
+# **Exercise_Modelado_de_Datos_SQL**
+
+This repository contains the exercise for the module **"Modelado de datos e introducción a SQL"** from the KeepCoding bootcamp **"Desarrollo Web | Edición XVII"**.
+
+- The exercise statement is provided in the file **Enunciado de la práctica.pdf**.
+- The files **videoclub.sql** and **videoclub_diagram.drawio** are the ones to be evaluated.
+- The files **tmp_videoclub.sql**, **videoclub.csv**, and **videoclub.xlsx** contain a dataset in different formats for testing purposes.