How Can I Use INNER and OUTER Joins to Replicate INTERSECT and MINUS in MS Access?

Utilizing Inner and Outer Joins to Emulate INTERSECT and MINUS Operations in MS Access

Unlike other database management systems, MS Access does not natively support the SQL INTERSECT and MINUS operators. However, it's still possible to achieve similar functionality using inner and outer joins.

INTERSECT Equivalent:

The INTERSECT operator performs an inner join, retrieving only records that exist in both tables. To emulate this in MS Access:

select distinct
  a.*
from
  a
  inner join b on a.id = b.id

MINUS Equivalent:

The MINUS operator performs an outer join, excluding records that exist in the second table. To achieve this in MS Access:

select distinct
  a.*
from
  a
  left outer join b on a.id = b.id
where
  b.id is null

Note: It's recommended to use the distinct keyword in both queries to ensure unique results.

If you encounter any ambiguity, providing sample data as part of your question will help illustrate the desired operation and provide more accurate guidance.

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