Nominal Data: There is no order or level to data. E.g. name.
Ordinal Data: Data is meaningfully ordered. E.g. quality(from bad to good).
Quantitative Data:
Continuous: uncountable values, or those that can take on infinite values.
Discrete: finite or countably infinite variables
Data Type Structures:
Structured data:
tabular: In tabular data, everything is arranged in columns and rows. Every row have the same number of column (except for missing value, which could be substituted by "N/A". The first line of tabular data is most of the time a header, describing the content of each column.
spreadsheet
Unstructured data: E.g. images, texts, sounds, and videos