In the database you have built, you need to create a relationship between two fields in two tables. Field 1 in Table A has the Number Data Type and Field 1 in Table B has the Currency Data Type. Will you be able to build a relationship?

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BlackTom AI · Accepted Answer

Let's unpack the scenario and the two fields involved. The question asks about establishing a relationship (commonly a foreign key relationship) between Field 1 in Table A (Number data type) and Field 1 in Table B (Currency data type).
Option 1: Yes. In some database systems, you can create a relationship between numeric types as long as the values can be compared or converted. However, foreign key constraints typically require the referencing and referenced columns to have compatible data types. If the Number type and Currency type are not considered the same or not explicitly compatible (for example, integer versus a decimal/money/decimal type with precision), the DBMS may reject the constraint unless an implicit or explicit cast is allowed. In practice, many systems prefer or require matching data types to enforce a foreign key, so this option is uncertain or database-specific rather than universally true.
Option 2: No. Given that one column is a Number data type and the other is Currency (which is usually a decimal/money type with fixed precision), many relational databases do not allow a direct foreign key relationship between non-matching or non-compatible data types. Without an explicit cast or a redesign to make the types align (or to store the same underlying primitive, e.g., both as decimal with the same precision), the constraint cannot be enforced at the schema level. This makes the relationship not possible in the straightforward sense described by the question.
To avoid confusion, consider an approach that uses matching data types for the fields (e.g., both as decimal/number with the same precision and scale) or introduce a surrogate key that is of a consistent type across both tables. If the database supports cross-type foreign keys with a cast, that would be an exception, but it is not universally guaranteed and often not recommended for integrity reasons. 
In summary, the most robust interpretation is that a relationship cannot be reliably built between a Number field and a Currency field in a typical relational database without ensuring compatible data types or redesigning the schema.

ACS19E1 - Microsoft Access 2019 Level 1 Module 9 Quiz

In the database you have built, you need to create a relationship between two fields in two tables. Field 1 in Table A has the Number Data Type and Field 1 in Table B has the Currency Data Type. Will you be able to build a relationship?

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