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SQL多對多關系與3個關系

[英]SQL many to many relationship with 3 relations

原文 2017-01-25 19:32:14 2 1 sql/ sql-server

是否可以建立多對多關系（使用新表）並包含 3 個表中的 3 個關系？ 如果是，這是一個好習慣嗎？

如果你有 3 個表，你應該只需要 2 個關系。 也許嘗試類似於以下的連接：

[英]Counting in Many to Many Relations in SQL

[英]SQL Many to Many relationship

[英]many to many relationship sql

[英]Many-to-many SQL relationship

[英]Is that many-to-many sql relationship?

[英]sql: many to many relationship join

[英]sql filter many to many relationship

[英]SQL select many to many relationship

[英]Handling a many to many relationship in sql

[英]sql query with many to many relationship

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