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Extended Learning Module J (Office 2007 Version). Implementing a Database with Microsoft Access. SOLOMON DATABASE. The steps to creating a database are Define entity classes and primary keys Define relationships among the entity classes Define fields for each relation (file)
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Extended Learning Module J (Office 2007 Version) Implementing a Database with Microsoft Access
SOLOMON DATABASE • The steps to creating a database are • Define entity classes and primary keys • Define relationships among the entity classes • Define fields for each relation (file) • Use a data definition language to create the database, which is the focus of this Module
SOLOMON DATABASE • In Figure J.1 (p. 2) on the following 3 slides, we’ve recreated the correct database structure from Extended Learning Module C • Revisit Module C if you need a refresher
Creating Solomon’s Database • Data dictionary - contains the logical structure for the information • To create the Solomon Enterprise database: • Start Microsoft Access • Click on Blank Database in the upper left corner of the screen • Enter Solomon Enterprises.mdb as the database name • Click on Create
Creating Solomon’s Database Enter a database name and click on Create Click on Blank Database
Creating Solomon’s Database • Our recommendation: Create a relation (table) in Design view: • Must switch from Datasheet View to Design View • Click on View in the upper left corner and then Design View • Enter a table name • Use the Design View to enter the specifications for the table
Creating Solomon’s Database This is Design View – our recommendation for creating the tables in a database To switch to Design View, click on View and then Design View
Creating the Raw Material Relation • Enter the four fields of the Raw Material relation • Raw Material ID • Raw Material Name • QOH • Supplier ID • Click on the Raw Material ID row and then the key button to designate Raw Material ID as the primary key
Creating the Raw Material Relation Integrity constraints for Raw Material ID Primary key identifier and the Primary key button
Creating the Bill of Material Relation • We created (in Extended Learning Module C) the Bill of Material relation to eliminate the many-to-many relationship between the Concrete Type and Raw Material relations
Creating the Bill of Material Relation • The Bill of Material relation has a primary key composed of two fields (composite primary key): • Concrete Type • Raw Material ID • Composite primary key - consists of the primary key fields from the two intersecting relations
Creating the Bill of Material Relation Composite primary key
DEFINING RELATIONSHIPS WITHIN SOLOMON’S DATABASE • The final structural task is to define how all the relations relate to each other • That is, link primary and foreign keys • Foreign key - a primary key of one file (relation) that appears in another file (relation)
Defining Relationships between Relations • To create relationships • Click on Database Tools in the menu area and then click on the Relationships button • Make each relation appear on the palette by highlighting each relation name and clicking on Add • Then click on the Close button
Defining Relationships between Relations Select tables and click on Add Relationship palette
ENTERING INFORMATION INTO SOLOMON’S DATABASE • To enter information, you simply double-click on the appropriate relation name Supplier relation structure
Referential Integrity • Referential integrity ensures consistency. For example, that you don’t put a non-existent Supplier ID into the Raw Material relation • The relationships we set up for referential integrity guard against bad information • Integrity constraints – rules that help ensure the quality of the information
Change the Structure of a Relation Click on View and then Design View and make the necessary changes
CREATING A SIMPLE QUERY USING ONE RELATION • Query-by-example (QBE) tool - helps you graphically design the answer to a question • Suppose we wanted to see a list of raw materials that shows • Raw Material Name • Supplier ID
Creating a Simple Query Using the Raw Material Relation Second, select the table, click on Add, and then close the box. First, click on Create and then Query Design
Creating a Simple Query Using the Raw Material Relation The result of the query Drag and drop the appropriate field names and then click on the exclamation point (Run).
Creating a Simple Query with a Condition Set the condition here
CREATING AN ADVANCED QUERY USING MORE THAN ONE RELATION • Suppose we want a query that shows • All order numbers • Date of orders • Where the goods were delivered • The contact person • The truck involved in each delivery • The truck driver in each delivery
Steps to Create an Advanced Query • Click on Create in the menu area and then Query Design • In the Show Table dialog box • Select and Add the relation names • Close the Show Table dialog box • Tables linked appear are joined by lines with • 1 beside the table with the primary key • The infinity sign by the table with the foreign key
Steps to Create an Advanced Query • Drag and drop the fields that you want from the appropriate relation into the QBE grid in the order that you want • Click on the exclamation point (Run) in the button bar to see the results of the query
GENERATING A SIMPLE REPORT • Click on Create in the menu area and then the Report Wizard button • Choose tables and/or queries: Lets you choose which table/query you want • Choose fields: Lets you choose the fields you want
Grouping, Sorting, Layout of Report • Grouping: Lets you specify grouping of information (we chose the default) • Sorting: Allows you to specify sorting (we chose the default) • Layout and orientation: Allows you to select layout and page orientation (we chose the default)
Style and Header of Report • Style: Allows you to choose from among predefined report styles (we chose the default) • Report header: Allows us to enter a title for the report. • The Report: Shows all customers and phone numbers.
Choose Table/Query and Fields 2. Choose tables and/or queries 1. Start to create a report
Choose Table/Query and Fields 4. Grouping 3. Choose fields
Grouping, Sorting, Layout, Style, and Title 6. Layout and orientation 5. Sorting
Grouping, Sorting, Layout, Style, and Title 8. Report Header 7. Style
REPORT WITH GROUPING, SORTING, AND TOTALS • Say we want to create the Supply Chain Management report from Extended Learning Module C • First, create a query • Then, put the query into the report generator
Steps for Creating a Report with Grouping, Sorting, and Totals • Click on Create in the menu area and click on the Report Wizard button • Choose tables/queries: Query: Supply Chain Query • Choose fields: Select all fields by clicking on the double greater-than sign (>>)
Grouping and Sorting Information • Top-level grouping: Allows you to choose ordering. Since we created a query, Access has defaulted to the first field • Further grouping: Lets you specify groups within the top grouping of Concrete Type, but we don’t want any further grouping • Sorting: Next we have a chance to sort our information
