df-research/dataframe/docs/StardustDocs/topics/info.md

General information about DataFrame:

• count / rowsCount() — number of rows
• countDistinct() — number of distinct rows
• columnsCount() — number of columns
• columnNames() — list of column names
• columnTypes() — list of column types
• head(n) — first n rows (default 5)
• schema() — schema of columns
• describe() — general statistics for every column