Download - Microsoft Access 2010- Illustrated
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Microsoft Access 2010- Illustrated
Unit B:Building and Using Queries
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Objectives
• Use the Query Wizard• Work with data in a query• Use Query Design View• Sort and find data(continued)
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Objectives (continued)
• Filter data• Apply AND criteria• Apply OR criteria• Format a datasheet
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Using the Query Wizard
• A query allows you to select a subset of fields and records from one or more tables and then present the selected data as a single datasheet
• Because a query doesn’t physically store the data, a query datasheet is sometimes called a logical view of the data
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Using the Query Wizard
• Technically, a query is a set of SQL (Structured Query Language) instructions, but because you can use Access query tools such as Query Design View, you are not required to know SQL to build or use Access queries
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Using the Query Wizard Page 27 Figure B-1
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Working with Data in a Query
• You enter and edit data in a query datasheet the same way you do in a table datasheet
• Any edits you make in a query datasheet are permanently stored in the underlying tables, and are automatically updated in all views of the data in other queries, forms, and reports
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Working with Data in a Query Page 29 Figure B-3
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Using Query Design View
• Use Query Design View to:• Add, delete, or move the fields in an
existing query, to specify sort orders, or to add criteria to limit the number of records shown in the resulting datasheet
• Create a new query from scratch
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Using Query Design View
• Query Design View presents the fields you can use for that query in small windows called field lists
• If you use the fields of two or more related tables in the query, the relationship between two tables is displayed with a join or link line identifying which fields are used to establish the relationship
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Using Query Design View Page 31 Figure B-5
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Sorting and Finding Data
• Works the same way for queries as it does for tables
• Data can be sorted by clicking the list arrow on a datasheet’s column heading, then click a sorting option
• Data can also be sorted by using the Sort and Find buttons on the Home tab
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Sorting and Finding Data Page 33 Figure B-7
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Filtering Data• Filters provide a temporary way to
display a subset of records that match given criteria
• Filters are not used to calculate sums, averages, counts, etc.
• Filters are removed when the datasheet is closed
• Filters can, however, be saved as queries
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Filtering Data• Filter By Selection: Filtering by a
given field value. Filters records for an exact match.
• Filter By Form: Filters by comparative data
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Wildcards• Used to search for a pattern;
represents any character• Entered as criteria• ? Used to search for a single
character• * Used to search for any number of
characters
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Filters vs. Queries Page 35 Table B-1
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Applying AND Criteria
• AND criteria means all criteria must be true for the record to be selected
• Created by entering 2 or more criteria in the same Criteria row of the query design grid
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Criteria Syntax
• Quotation marks (“) around text criteria and pound signs (#) around date criteria are automatically added by Access
• Criteria in Number, Currency, and Yes/No fields are not surrounded by any characters
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Searching for Blank Fields
• 2 common criteria are Is Null and Is Not Null
• Is Null – Finds all records where no entry has been made
• Is Not Null – Finds all records where any entry has been made (even if zero)
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Comparison Operators Page 37 Table B-2
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Applying OR Criteria
• OR criteria means any one criterion must be true for the record to be selected
• Created by entering 2 or more criteria on different Criteria rows of the query design grid
• Also created by entering 2 or more criteria in the same Criteria cell separated by OR
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Applying OR Criteria Page 39 Figure B-15
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Formatting a Datasheet
• Can: Change font size, font face, colors, gridlines
• Cannot: Add custom headers, footers, images, subtotals
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Formatting a Datasheet Page 41 Figure B-18
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Summary
• Using the Query Wizard• Working with data in a query• Using Query Design View• Sorting and finding data• Filtering data• Applying AND criteria• Applying OR criteria• Formatting a datasheet
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