Float and double are primitive data types used by programming languages to store floating-point real (decimal) numbers like 10.923455, 433.45554598 and so on.
At the most basic form, the database schema is the representation of the logical configuration of the relational database, as a whole or as a part. It can also be defined as the skeletal structure which demonstrates the entire database through a logical view. It may exist only as a visual representation or as a group of formulae which govern a database. These formulae are communicated through a data definition language for the system to understand, such as SQL.
A data structure can be any organization, management, and storage format of data that allows efficient access and modification. It is a collection of data values, relationships amongst them, and the various functions or operations that can be applied to the data.
Every programming language has provision for data structures. In the Python programming language, there are a total of 4 inbuilt data structures. These are namely list, tuple, dictionary, and set. Each of them is unique in its own right.