Aggregate calculations are vertical computations that rely on secondary “Group by” fields to define the aggregation level. By activating the "totals" row in the query design grid, the manner in which records are grouped together can be controlled. In this movie, Adam clarifies what the totals row is doing by moving through the process step-by-step.
- [Voiceover] We can use the totals field…within Access to help build some summary queries.…Applying aggregate operations within the design view…is a simple way to move beyond just displaying…the data that's currently in the database.…And there are a bunch of additional options that we can…apply that aren't available when using the wizard.…Let's explore the totals row in design view…a little bit more closely in order to understand…exactly what's going on with these summary calculations.…Let's start by creating a new query…in design view that's about our states.…We'll add that table into the query…and it'll close the Show Table window.…Now the first thing I'm going to do…is add in our regions here.…
Double click on that and that'll add it into the query.…If I run it, we're going to see all…the different regions that come from our states.…You'll notice that we have 51 records,…which represents the 51 states,…including the 50 states plus the District of Columbia.…Let's go back into design view…and I'm gonna turn on that totals row.…
- Creating a query with the wizard
- Defining query criteria
- Using comparison and wildcards in criteria
- Working with joins
- Creating parameter queries
- Using the built-in functions in Access
- Summarizing data
- Aggregating records with totals
- Working with dates
- Creating alternative queries: unmatched, crosstab, and more
- Writing queries with SQL
Skill Level Intermediate
1. Introduction to Access Queries
2. Creating Simple Select Queries
3. Creating Parameter Queries
4. Use the Built-In Functions
5. Aggregating Records with a Totals Query
6. Working with Dates in Queries
7. Understanding Program Flow Functions
8. Alternative Query Types
9. Writing Queries with Structured Query Language
Explore the basics of SQL5m 59s
10. Useful Query Tricks
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