1. MS Access: Querying Tables
Instructor: Vicki Weidler
Assistant: Joaquin Obieta

2. Overview Learn how to create, run, print, and save queries
Use queries to sort data and filter query results
Learn how to modify query results
Understand how to modify queries by adding/ removing fields and by using comparison
operators
Learn how to use AND and OR conditions
Learn how to find records with empty fields
Perform calculations in queries by using expressions and aggregate functions

3. Comparison Operators > Greater than < Less than = Equal to
<= Less than or equal to
>= Greater than or equal to
<> Not equal to
Use to specify criteria to find records with matching values in 1> fields
Use to specify a condition for a query

4. OR Conditions Used to specify two conditions in the criteria Example:
Unit_price is greater than 2 OR Qty_Available is equal to 700

5. AND Conditions
Used to show only the records that satisfy all the specified conditions
Example:
Unit_price is greater than 1.4 AND less than 1.9

6. Wildcard Operators
Used to locate text values when you can’t remember the exact text or word; placeholder
? Used to substitute for a single character
* Used to substitute for any number of characters
Other Wildcard Operators
[] Any character within the brackets b[aeo]ll finds “ball,” “bell,” and “boll” but not “bill” or “bull”
! Any character not in the brackets b[!ae]ll finds “bill,” “boll,” and “bull” but not “ball” or “bell”
- (hyphen) Any character in the specified range B[a-d]t finds “bat,” “bbt,” “bct,” and “bdt”
of characters. The range must be
in ascending order
# Any single numeric character 10# finds “100,” “101,” “102,” and so on but not “10A”

7. Empty Fields
Unknown (empty) values in fields are referred to as null values
Null values cannot be used in primary key fields or in calculations
Can display or remove null values to avoid/prevent problems

8. Calculations in Queries
When calculations are built into queries (and not stored in the source tables) it ensures the most up-to-date information
Calculations are performed each time the query is run
Perform calculations on single records or on a group of records
Examples: Totals, Averages, Counts

9. Summary Learn how to create, run, print, and save queries
Use queries to sort data and filter query results
Learn how to modify query results
Understand how to modify queries by adding/ removing fields and by using comparison
operators
Learn how to use AND and OR conditions
Learn how to find records with empty fields
Perform calculations in queries by using expressions and aggregate functions

10. Conclusion Resources Questions & Answers Evaluations Thank You!!!
Unfortunately no consultants on campus to come to your office
and help you design your database