How to Update a Microsoft Access Table Using an Inner Join?

Updating a Table Using an Inner Join

In Microsoft Access, executing a query such as the one provided can return a list of FermentIDs. However, to update a different table with this column using the inner join result, a specific update syntax must be followed.

Unlike in other database systems, Access requires the SET part of the update statement to be placed after the join. Additionally, the SELECT and ORDER BY clauses used to define the inner join result must be omitted.

The correct syntax for the update query is:

UPDATE FERMENT
INNER JOIN [BELGIUM BEER] ON FERMENT.FermentName = [BELGIUM BEER].FermentId
SET EXAMPLETABLE.FermentColumn = a.FermentColumn

In this query:

• FERMENT is the table to be updated
• [BELGIUM BEER] is the table being joined
• EXAMPLETABLE is the table containing the FermentColumn to be updated
• a.FermentColumn represents the FermentId result from the inner join query

By omitting the SELECT and ORDER BY clauses, Access knows that the join itself defines the records to be updated. The SET part then specifies the column in the EXAMPLETABLE table to be updated with the FermentId from the join result.

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