From what I understand (I'm just starting to look into this myself as a potential career option), database design and other technical skills like scripting and web design are becoming an increasingly important part of library science. There's a new-ish degree, "Masters in Library and Information Science", that combines both library and information knowledge like this.

There's plenty of open source library management tools such as Evergreen[1] or Invenio[2] for more standard data (like book metadata) but it's still helpful regardless to understand how databases work, what fields might be useful, how normalization works, etc. to better organize and understand the data in a library.

[1]https://evergreen-ils.org/ [2]http://inveniosoftware.org/