Basically, Business Analyst courses don’t need any prerequisites. But for the advance level course, you can learn the basics of these three areas:
Math - basic statistics, machine learning, optimization models, NLP, neural networks
Business - Retail, Healthcare, Telecom, Insurance, Technology, marketing, operations, sales, product, etc.
Technology - SQL, Excel, R, Python, SAS, Tableau
If you want to become a Business Analyst, check out this Business Analyst Training Course by Intellipaat that provides hands-on projects, certification, and job assistance.