What is a database schema?
a) The structure or blueprint of the database, including tables, columns, and relationships
b) A copy of the database stored for backup purposes
c) A table that contains metadata about the database
d) A view that shows the data in a table
Answer:
a) The structure or blueprint of the database, including tables, columns, and relationships
Explanation:
A database schema refers to the structure or blueprint of a database. It defines the tables, columns, data types, relationships between tables, indexes, and other elements that organize the data within the database.
The schema provides a logical framework for how the data is stored and accessed, ensuring that the database is efficient and easy to manage. Schemas can be modified as needed to accommodate new data requirements or to optimize performance.
A well-designed schema is crucial for maintaining data integrity, consistency, and performance in a relational database management system (RDBMS).