The correct answer is: Both a and b.
A relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model. A relational database is a collection of data items organized as a set of formally described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables.
In a relational database, data is stored in tables. A table is a two-dimensional structure that consists of rows and columns. Each row represents a single record, and each column represents a single attribute of that record.
For example, a table of customers might have columns for customer name, address, phone number, and email address. Each row in the table would represent a single customer.
Tables are related to each other through common attributes. For example, the customer table might be related to the order table through the customer ID attribute. This means that each customer in the customer table has a unique customer ID, and each order in the order table has a customer ID. This allows us to join the two tables together to find all of the orders for a particular customer.
The relational model is a powerful way to organize data. It allows us to store data in a way that is both efficient and flexible. We can easily add new data, change existing data, and delete data without having to worry about disrupting the database.
The relational model is also a very popular way to organize data. Most modern database management systems are based on the relational model.
In conclusion, a relational database management system (RDBMS) package manages data in more than one file at once. It organizes these files as tables, which are two-dimensional structures that consist of rows and columns. Each row represents a single record, and each column represents a single attribute of that record. Tables are related to each other through common attributes.
