Is this statement true or false:

A database schema can have a many-to-many relationship directly between 2 tables.

Question

Is this statement true or false:

A database schema can have a many-to-many relationship directly between 2 tables.

BlackTom AI · Accepted Answer

When evaluating whether a database schema can have a direct many-to-many relationship between two tables, we need to consider how relational databases model such associations.
Option 1: True. This statement would imply that two tables can reference each other in a many-to-many fashion without an intermediate structure. In practice, most relational databases require an intermediate table (a junction or associative table) to implement a many-to-many relationship, because a direct foreign key in each table cannot capture multiple associations between the same two entities. 
Option 2: False. This reflects the standard modeling approach: a direct many-to-many link between two tables is not supported by a simple pair of foreign keys; instead, you introduce a third table that holds foreign keys to both tables, with one row representing a single association between a row in the first table and a row in the second. This junction table can also carry additional attributes about the relationship itself if needed. 
Additional detail: Without a junction table, you could attempt to encode many-to-many links in one table using arrays or repeated fields, but that breaks normalization principles and queryability. Proper normalization for relational databases typically mandates a separate linking table to express the many-to-many relationship cleanly. 
Therefore, the statement described in Option 1 contradicts the conventional relational design, supporting the view captured in Option 2 as the accurate representation of how to model such relationships.

4510_COMP_SCI_X_0019 Quiz 9

Is this statement true or false: A database schema can have a many-to-many relationship directly between 2 tables.

查看解析

登录即可查看完整答案

类似问题

In the figure shown below, which attribute is a composite attribute in the Member table?

For the relationship represented in the figure, which of the following is true?

Which criteria is useful in selecting a primary key from among several candidate keys?

In the figure shown below, which attribute is a derived attribute in the Member table?

Using the Entity Relationship Diagram you have drawn on your piece of paper for the Hamilton Island 'BoatRaceResults' Table, answer the following question. Which is a Foreign Key of the BoatRaceResults table?

Using the Entity Relationship Diagram you have drawn on your piece of paper for the Hamilton Island 'BoatRaceResults' Table, answer the following question. Which would be the best choice for a primary key of the BoatRaceResults table?

更多留学生实用工具

考试浏览器助手

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