This document provides an overview of queries in Microsoft Access, including: - Simple queries allow selecting records from one or more tables using criteria. Calculated fields can be created using the Expression Builder. - More complex queries include grouping data, creating tables from queries, updating data, adding new records, and deleting records. Crosstab queries summarize and reformat data. - The module teaches the concepts of queries, building queries visually, writing selection criteria, and using calculated fields and expressions. However, it does not cover everything about queries.

1. MODULE 3
QUERIES
ALEXANDER BABICH
ALEXANDER.TAURUS@GMAIL.COM

2. MODULE OVERVIEW
• Concepts related to queries.Visual query building tools
• Query Designer. Data selection conditions
• Create calculated fields. Using the Expression Builder
• Query with group operations
• Create a table with a query. Update data. Put a new data
• Data deletion. Crosstab queries

3. LESSON 1: SIMPLE QUERIES
• Concepts related to queries.Visual query building
tools
• Query Designer. Data selection conditions
• Create calculated fields. Using the Expression
Builder

4. QUERIES
• A tools to get answers to
questions
• selection of certain records
from the database
• update tables
• inclusion of new records
• The concept of the same
order as the filters

5. QUERYWIZARD
Simple Query Wizard

6. QUERYWIZARD

7. QUERYWIZARD

8. QUERYWIZARD

9. QUERYWIZARD

10. QUERY DESIGNER

11. QUERY DESIGNER

12. SELECTION CRITERIA
boolean expression
• >30
• =‘Smith‘,‘Smith’
• =10, 10
• Like [prompt]
• Or, And
• Between, Is, In

13. CALCULATED FIELDS
Fields that are the result of calculations over the values of
other fields
SHIFT+F2

14. EXPRESSION BUILDER
Ability to search and
insert expression
components
• Identifiers
• Field names
• Spreadsheets
• Form
• Requests
• Function Names and
Arguments
• Can be used in tables,
forms, reports, queries

15. EXERCISE
1. Supplement your database
with relevant queries
2. Use selection criteria and
calculated fields

16. LESSON 2: MORE COMPLEX
QUERIES
• Query with group operations
• Create a table with a query. Update data.
Put a new data
• Data deletion. Crosstab queries

17. TYPES OF QUERIES
• Select query
• extract information from one or several tables, forming
a temporary table on their basis
• Change query
• creating new tables or making changes to existing ones
• Crosstab query
• summarize data from one or more related tables and
form a new table
• Query with parameter
• Actually are not separate requests.
• SQL query

18. GROUPINGS IN QUERIES
• ‘Totals’ button
• a line with the name ‘Total’, for each field in which
the value Group By is specified

19. QUERYTO CREATE A TABLE
• In design mode, it is no different from a select query
• If ‘Show’ is unchecked for any field, then the field will not
appear in the table being created
• INTO clause at the end of a SELECT statement

20. QUERYTO CREATE A TABLE

21. UPDATE (CHANGE) QUERY
To make changes to a group of records of one or more tables
in one operation

22. UPDATE (CHANGE) QUERY

23. ADD (CHANGE) QUERY
• Copying records from one table to another
• Adding records from different tables
• Adding records containing calculated fields
• Copy temporary dataset to target table
• Adding records to a table in an external
(temporary) database

24. ADD (CHANGE) QUERY

25. DELETE (CHANGE) QUERY
• Query to delete all records from the table
(clearing the table)
• Query for deletion with a limit on the number of
records to be deleted
• Delete query using external table join

26. DELETE (CHANGE) QUERY
• First you need to create a copy of the table.
• select ‘Copy’ from the context menu
(or from ribbon, or just CTRL+C)
• Paste (CTRL+V)
• Structure Only – empty table
• Structure and Data – same dataset
• Append Data to ExistingTable

27. DELETE (CHANGE) QUERY

28. DELETE (CHANGE) QUERY
Query to delete all records from the table (clearing the table)
DELETE * FROM [...];

29. QUERYWITH A LIMIT ONTHE NUMBER
OF RECORDSTO BE DELETED

30. DELETE QUERY USING EXTERNAL
TABLE JOIN

31. CROSSTAB QUERY
• For in-depth analysis of the information stored in the
tables
• Very similar to the pivot table

32. CROSSTAB QUERY

33. TEST QUESTION
When you first create a query, you select which of the following?
(Pick one answer)
1. A record source
2. A system table
3. A record set

34. TEST QUESTION
The record source can be a combination of tables and
queries
When you first create a query, you select which of the following?
Answer:
1. A record source

35. TEST QUESTION
Use criteria in a query when you need to do which of the following?
(Pick one answer)
1. Ensure your data is properly formatted
2. Add formulas to a table
3. Sort, filter, or otherwise limit what the query returns

36. TEST QUESTION
Criteria can be quite powerful, too. For example, you can use
criteria to find records for people who live in a given city and
have birthdays that fall between dates that you specify
Use criteria in a query when you need to do which of the following?
Answer:
3. Sort, filter, or otherwise limit what the query returns

37. TEST QUESTION
Before you can use multiple tables as a record source,
those tables must: (Pick one answer)
1. Be open in Datasheet view
2. Participate in a relationship
3. Not serve as the record source for another query

38. TEST QUESTION
If the tables don’t participate in a relationship, the query
returns all the data in each table, and the results are almost
always meaningless
Before you can use multiple tables as a record source, those tables
must:
Answer:
2. Participate in a relationship

39. TEST QUESTION
An expression is: (Pick one answer)
1. A formula stored in one or more database tables
2. A formula that just calculates dates
3. An object that can perform calculations and other tasks
such as data validation

40. TEST QUESTION
This course has shown you a couple of ways to use expressions.
The Quick Reference Card that’s linked to at the end points you
to a lot more information about them
An expression is:
Answer:
3. An object that can perform calculations and other
tasks such as data validation

41. TEST QUESTION
This module has taught you everything you need to know about
queries (Pick one answer)
1. True
2. False

42. TEST QUESTION
This module has taught you everything you need to know about
queries
Answer:
2. False

43. EXERCISE
Supplement your database with
suitable queries of different
types

44. BOTTOM LINE
• The concepts of queries.Visual query building tools
• Query Builder.Writing data selection conditions
• Creating Calculated Fields. Using Expression Builder
• Select query with group operations
• Create table with query. Update query. Add query
• Delete query. Crosstab query

45. QUESTIONS?

46. SELF-TEST
• What types of queries you can use in Access?
• What are calculated fields and how are they
created?
• How do different types of requests differ from
each other?
• What is the use of crosstab queries?