Key Milestone for Relational Model in the Mid-1970s
What was a key milestone for the relational model created in the mid-1970s?
a.) One of the milestones during this period was the model being created based on mathematical set theory and representing data as independent relations by E.F. Codd.
b.) One of the milestones during this period was focusing on managed records rather than relationships.
c.) One of the milestones during this period was the use of a star schema support for data warehousing.
d.) One of the milestones during this period was introducing the subschema.
Answer:
The key milestone for the relational model created in the mid-1970s was a.) One of the milestones during this period was the model being created based on mathematical set theory and representing data as independent relations by E.F. Codd.
The key milestone for the relational model created in the mid-1970s was indeed the development of the model based on mathematical set theory by E.F. Codd. This model represented data as independent relations, introducing the concept of tables with rows and columns, and establishing the foundation for the relational database management systems (RDBMS) that we use today. Codd's work revolutionized the field of database management and laid the groundwork for data modeling, querying, and manipulation in a relational manner.
Thus, the correct option is: (a).