sampling from a big dataset

I have a dataset that I don't know its distribution. How can I choose a good sample from it ( the term "good" means a sample that represent the same distribution as the main dataset)

[Mohammad Sami]

Please see the following help topic on working with probability distribution in matlab.

https://www.mathworks.com/help/stats/working-with-probability-distributions.html

[Azar Alizadeh]

Thank you so much for helping.