22 November Databases

Presentations Tega: news

1954 Prediction

Creating a Data Base Collection of related information Will hold tables and queries Create a database Access: New: Blank Database Create file

Creating a Table Use design view Define fields Select Tables from main view Create table in design view Or generally available through Insert: Table: Design View

Creating a Field - basics Field name: descriptive name of field Data Type Text – if no need to further divide Number – if you want to compare values Date/Time – if you want to process in that form Yes/No – true/false: Boolean AutoNumber – if you need a unique number id Currency – if you want to manipulate as such Description comment

Creating a Field - additionals Under General tab Default Value: used if no value filled in Required: if value required Validation rule: required constraints Partial Boolean: field name assumes as leading argument >5 means the field must be greater than 5 Validation test: error message when constraint not satisfied

Connecting Tables Relationships icon Tables Add all tables you want to link Drag from key to field that should be the same Do not click any options

Queries Allows you to gather information from across tables Select Queries from main view Create Query in design view Or generally available through Insert: Query: Design View

Creating a Query Add all tables Needed for context Reminds you of the fields Identify the fields that you want used In the order that you want them

Creating a Query - enhancements Can choose not to show Show check box Reminds you of the fields Can sort Will sort fields left to right Ascending or descending

Forms and Reports Allows you to create nicely formatted inputs or reports Can combine fields from different tables

Database assignment Requirement 3 tables All types of data fields used 4 queries At least 2 with selection criteria Optional Forms and reports

A possible assignment Tables Products Buyers Orders Queries Products by gender or age All orders of a particular product All orders for a particular buyer Demographic summary of buyers

Rest of the Semester November 24 Last day to turn in updated web page November 29 Test and Arts grades returned to you Confirmation of soft copy of all materials Class: design and implementation of a database December 1 Database due Class: solving problems with computers Technologies that you might use in your final project December 6 Class: Computer history and famous bugs Open problem solving session December 8 -- Final 10 minute presentation Turn in 2-3 page paper (hard and soft) and soft copy of presentation December 10 – grades posted Comments on final by