Tableau expresses fields and assigns data types automatically. If the data source appoints the data type, Tableau will use that data type. If the data source doesn’t individually assign a data type, Tableau will assign one. Tableau consist of the following data types:

Date values
Text values
Numerical values
Date and time values
Boolean values (True or False conditions)
Geographic values (longitude and latitude used for maps)

It seems like there might be a confusion in your question. MongoDB and Tableau are two different technologies with distinct purposes.

MongoDB is a NoSQL database that stores data in a flexible, JSON-like format called BSON (Binary JSON). In MongoDB, you work with collections and documents rather than tables and rows as in traditional relational databases. MongoDB supports various data types, including string, number, boolean, date, array, object, and more.

On the other hand, Tableau is a data visualization and business intelligence tool. It is not a database, and it doesn’t have data types like a database system does. Instead, Tableau connects to various data sources, including databases like MongoDB, to visualize and analyze data.

If you have a question about MongoDB, I can provide information about its data types. If you meant to ask about Tableau, it doesn’t have data types in the same sense as a database, but it works with the data types from the connected data sources. Please clarify your question so I can assist you better.