One of the key factors in creating a clean and robust database is knowing what data needs to be stored, and what data can be derived or created from other records. By using some mathematical operators such as addition, subtraction, and multiplication, Adam demonstrates how to calculate new values from data already in the database.
- [Voiceover] One of the key factors in creating…a clean and robust database, is knowing what date…you need to store and what data you can derive or create…from other records.…For instance, if we think about…how a payroll database might work, the number we're after…is how much the employee earned…at the end of a two week pay period.…But will that dollar amount appear in any of our…data tables, and I'd say, probably not.…More than likely, a payroll database…will simply include a record for the employee's…hourly wage or salary and another record…for the number of hours worked each shift.…When cutting the checks, the payroll department…simply adds up the number of hours worked…during that pay period, multiplies that by the hourly wage,…and gets the total for the check.…
By using some simple mathematical operations,…in this case addition and multiplication,…the payroll department is able to derive…the value of the check, even though…it doesn't appear anywhere in the database.…The Design View in Access allows us to easily add…
- 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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