How does DBMS help deal with data inconsistency?
2. What is an RDBMS?
3. What does the primary key do?
Answer the following questions.
Answers
Answer:
1)A DBMS can reduce data redundancy and inconsistency by minimizing insulated files in which the same data are repeated. The DBMS uncouples programs and data, enabling data to stand on their own.
2)A software system used to maintain relational database is a relationship database management system(RDBMS). Many relational database systems have an option of using SQL (Structured Query Language) for quearing and maintaining the database.
3)The Primary Key constraint uniquely identifies each record in a table. 1) Primary key must contain unique values, and cannot contain null values. 2)A table can have only one Primary Key, and in the table this primary key can consist of single or multiple columns (fields).
Answer:
A DBMS can reduce data redundancy and inconsistency by minimizing isolated files in which the same data are repeated. ... The DBMS uncouples programs and data, enabling data to stand on their own.