devxlogo

Creating Inner Joins In An Access Database

Creating Inner Joins In An Access Database

Why Trust Us

This seemingly undocumented SQL table qualification syntax mightbe useful to access an external table by using the ‘IN’ keyword.I had used this ability before, but kept having trouble with joins(probably due to my syntax) until I used the database path asa qualifier for the table. In this example I separated the fourtables found in the Biblio database into their own databases andissued this query in an empty database: 

         SELECT Authors.*        FROM C:VB3Biblio1.Authors _                INNER JOIN _                (C:VB3Biblio2.MDB.Titles        INNER JOIN _                (C:VB3Biblio3.MDB.Publishers        INNER JOIN _                C:VB3Biblio4.MDB.[Publisher _                Comments]        ON Publishers.PubID = [Publisher _                Comments].PubID)         ON Titles.PubID = Publishers.PubID)         ON Authors.Au_ID = Titles.Au_ID;

While this may not work on ODBC, it works perfectly with Accessdatabases and overcomes the single external database ability withthe ‘IN’ clause.

See also  Professionalism Starts in Your Inbox: Keys to Presenting Your Best Self in Email
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist

Charlie Frank

Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.
View Author
Show More