5 Aug Microsoft Access 2010 Relational databases’ program Part of the Microsoft Office package Administer relational database Update database through forms Build complex queries Create reports Competitors: Oracle, PostgreSQL, MySQL 1

5 Aug Slide only for explanation, database theory will not be asked at exam Single-table databases Fields and records 1.Header in the first line 2.Same content for every field 3.Each record refers to a single object 4.Records are independent 5.Records and fields are disordered 6.No field which can be calculated

5 Aug Slide only for explanation, database theory will not be asked at exam Multiple-table databases Primary key ID Structured tables connected via relations “one to many” or “many to one” Foreign key “many to many”: junction table

5 Aug Slide only for explanation, database theory will not be asked at exam Example: Your library It is a database of your books and their authors. Suppose that each book has only one author.

5 Aug It is a database which handles data regarding students and their exams. Slide only for explanation, database theory will not be asked at exam Example: students and exams

Expanded with information on professors and their exams Many to many relation  another extra table 6 Slide only for explanation, database theory will not be asked at exam Example: students and exams 2 5 Aug 20146

Northwind database example 5 Aug Northwind 2003 database example Copy the file to your Desktop Enable Access saves automatically data modifications!!!  Undo is possible only for the last action  File  Save Saves only created objects inside the database file To duplicate the database  File  Save Database As 7

Table 5 Aug Northwind database overview  Home  View  Datasheet View  Home  View  Design View Fields types Text: max 255 alphanumeric characters Memo: max 65,535 characters Number and Currency and Autonumber Date/Time Yes/No OLE object: link or embed external objects Hyperlink Primary key 8

Select query 5 Aug a question which produces a virtual table called view  Create  Queries  Query Wizard  Home  View  Design View Show Sorting Criteria Other fields values The query asks for a value  Query  Show tables

Select query: virtual fields 5 Aug Expression builder Functions: DateDiff, DateAdd, Year, Date Operators: Between, Like * ? Expression builder for validation rules and in table validation rules: Like