Subqueries in Access SQL with IN, EXISTS, and Correlation
Some data questions are easiest to express as a query inside another query: customers who have ordered, products that have never sold, orders containing…
Category: Microsoft Office Tutorials
Aggregate Functions, GROUP BY, and HAVING in Access SQL
Detailed order rows are useful for auditing, but managers usually need totals, counts, averages, and rankings. Aggregate functions in Access SQL convert transaction rows…
Update and Delete Data in Access SQL with VBA Safely
Update and Delete Data in Access SQL with VBA Safely Editing and removing records are essential parts of database work, but they are also…
SQL in Microsoft Access Tutorial: Types of JOINs (Inner, Left, Right) and Joining Multiple Tables
In our previous tutorial, we learned how to create one-to-many and many-to-many relationships between tables using primary and foreign keys. However, a fundamental question…