What is the minimum number of tables possible in a relational DBMS?

Question

BlackTom AI · Accepted Answer

A relational database is built from relations (tables), and you can validly have just one relation in the schema — so the minimum number of tables is 1.

1) Relevant knowledge points and concepts
- In the relational model the basic storage/organizing unit is a relation (commonly implemented as a table).
- A database schema can contain any positive number of relations; normalization and design choices determine how many are used, but the model permits a single relation.
- Practically, a DBMS can host a database with a single table that holds all required attributes/rows.

2) Step-by-step reasoning
- The question asks for the minimum possible count of tables that a relational DBMS can have.
- The relational model does not force multiple tables; it only defines how data is structured within relations.
- Therefore, the smallest nonzero number of tables that still constitutes a usable relational schema is one table.

3) Intermediate considerations (no numerical calculation required)
- Consider the options: 4, 3, 2, 1. Each larger number is possible but not necessary.
- A database with one table can store any set of attributes and multiple rows, so it satisfies the definition of a relational database.

4) Why the correct answer is correct
- Answer d. 1 is correct because the relational model allows a schema consisting of a single relation; nothing in the model mandates multiple relations. One table can represent entities and their attributes, so one is the minimum non-empty configuration.

5) Why the other options are incorrect
- a. 3, b. 4, c. 2 are all higher than the minimum. They are possible configurations but not the minimum required.

Conclusion: The minimum number of tables possible in a relational DBMS is 1, which matches the provided answer (d. 1).

What is the minimum number of tables possible in a relational DBMS?单项选择题

类似问题

The primary object in a database for collecting and storing data is called a

Which database object is used to store data?

In the following SQL statement, what does "STUDENT" represent? SELECT EagleID FROM STUDENT;

Which database object is used to store data?

Which database object is used to store data?

Which database object is used to store data?

Question 1: Identifying Available Tables After loading the database, determine how many tables are available in midterm1.db. Question: What is the number of tables present in the database?

Which database object is used to store data?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单