Question

Помогите пожалуйста срочно сейчас спасибо вам большое за ответы In Ms Access relationships between tables are used to: [a] Reduce number of tables [a] Avoid repetition of data [a] Make copies of tables [a] Provide integrity of data [a] Simplify creation of queries, forms, and reports [a] Remove secondary tables

Answer 1

In Ms Access relationships between tables are used to:

[a] Reduce number of tables

[a] Avoid repetition of data

[a] Make copies of tables

[a] Provide integrity of data

[a] Simplify creation of queries, forms, and reports

[a] Remove secondary tables

Answer 2

Relationships in MS Access

In Microsoft Access, relationships between tables are used for several purposes:

1. Reduce the number of tables: Relationships allow you to organize data across multiple tables, reducing the need for duplicating data in different tables. This helps in maintaining a more efficient and manageable database structure.

2. Avoid repetition of data: By establishing relationships between tables, you can store related data in separate tables and link them through common fields. This eliminates the need to repeat the same data in multiple tables, reducing data redundancy and improving data consistency.

3. Provide integrity of data: Relationships in MS Access enforce referential integrity, which ensures that data in related tables remains consistent. Referential integrity rules prevent the creation of orphan records (records without a corresponding record in the related table) and maintain data integrity by enforcing constraints on relationships.

4. Simplify the creation of queries, forms, and reports: Relationships make it easier to create complex queries, forms, and reports that involve data from multiple tables. By establishing relationships, you can join tables based on related fields and retrieve data from multiple tables in a single query or form.

5. Remove secondary tables: Relationships can help in identifying secondary tables that are no longer needed. If a table is not related to any other table in the database, it may indicate that it is not required and can be removed to simplify the database structure.

Please let me know if there's anything else I can help you with!