Join Adam Wilbert for an in-depth discussion in this video Understanding dates as serial numbers, part of Access 2010: Queries.
You would think that storing dates in your database will be a fairly…straightforward routine operation.…On the surface, to you and I it is.…But behind-the-scenes Access does a lot of work to make sure that your…date-specific records are kept in order.…Understanding how Access stores, retrieves, and formats date and time-based data…can really help down the road.…Access uses a serial number system to keep track of dates and times.…Let's open up the Chapter 5 custom group and we'll take a look at our Dates table.…Here we have a table listing of dates.…If I run a query called DateSerial number, I have those dates listed down and I…have a function that converts the date into the serial number representation.…
You'll see that dates are represented by a whole number and they decrease as…you go back in time,…until you get to December 30th, 1899, which is represented by the serial number 0. …Anything before that date gets negative; anything after that date is positive.…Now the same thing applies to times.…
- Naming conventions and best practices
- Working with joins
- Using comparison operators
- Defining criteria for select queries
- Creating parameter queries
- Creating calculated fields
- Working with dates and times
- Using the Expression Builder
- Creating conditional statements
- Making, deleting and appending records
- Building reports
Skill Level Intermediate
1. Creating Queries in Access
2. Creating Simple Select Queries
3. Creating Parameter Queries
Creating a combo box4m 30s
4. Applying Aggregate Calculations (aka Totals Queries)
5. Working with Dates in Queries
6. Understanding Conditional Statements
7. Linking It All Together
8. Alternative Query Types
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