We should use Id CSS selector if we want to define a style for a unique element. Explanation: CSS stands for cascading style sheets that are used to display the content inside any text or are generally used in the web pages.
The internal schema refers to the physical storage structure of database.
It refers to the lowest level of abstraction.
This is also called physical schema.
It contains multiple instances of multiple internal records.
It provides information about the representation of the whole database that what data is stored in DB and in what form e.g the data is stored in the records form on the disk.
This schema gives detailed description of internal model which involves storage structure of the database, representation and classification of stored data. This format of data is only understandable by the Database management system.
