BI analyst needs to have skills of data analysis problem solving, good presentation, decision making, specific industry knowledge, and analytical skills. BI professionals must have proficient knowledge of visualization tools like Tableau, Qlikview, or Power BI. BI analyst should be familiar with either R programming or SAS. Having knowledge of these programming languages are important for data analysis and making statistical inference from data.
If you are interested to become a BI analyst, I recommend Business Intelligence Course by Intellipaat.
For more information, you can watch this video on Business Intelligence: