SeekTable allows you to perform ad-hoc analysis of business data with pivot tables and charts. It is very easy to use, it is enough to upload your dataset (CSV/TSV/Excel file) and build a report. Tool can be used for real-time reporting by large datasets too as it can connect directly to SQL databases, MongoDb or ElasticSearch; data is not imported - SeekTable generates and executes database query on-the-fly, and you always get up-to-date numbers. Saved reports may be delivered on schedule with help of Zapier or MS Flow.
Even if you're not familiar with pivot tables you still can get answers with SeekTable "Ask a question" feature which allows to build a report in a search manner by entering queries like "total sum by country and product category".