Hi Is it possible to train excel files

If your excel file is pretty simple, you can use the excel loader

https://llamahub.ai/l/file-pandas_excel

If its a complex/numerical excel sheet, I would look into the pandas or SQL index instead

Using SimpleDirectoryReader, would excel file work?

It worked well for pdf, docx files.

Hmm nope, doesn't look like it

https://github.com/jerryjliu/llama_index/blob/f614448a045788c9c5c9a774f407a992ae1f7743/llama_index/readers/file/base.py#L18