Which type of relationship can exist between tables in a relational database?

Study for the SQA Higher Computing Science Exam with flashcards and multiple choice questions. Each question offers hints and explanations. Prepare effectively for your exam!

In a relational database, tables can have different types of relationships that define how data in one table relates to data in another. The three primary types of relationships that can exist are:

  1. One-to-One (1:1): This relationship occurs when a single record in one table is directly related to a single record in another table. For instance, if you have a table for users and another table for user profiles, each user may have exactly one profile.
  1. One-to-Many (1:Many): This is the most common relationship in relational databases. It happens when a record in one table can be associated with multiple records in another table. For example, a single customer can place multiple orders, so there would be one customer record associated with many order records.

  2. Many-to-Many (Many:Many): This relationship exists when multiple records in one table can relate to multiple records in another table. A typical example is a database of students and classes, where a student can enroll in multiple classes, and each class can have multiple students.

The correct answer, which acknowledges the existence of all three relationship types (1:1, 1:Many, and Many:Many), accurately represents the flexibility

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