Unit 23 Database and Spreadsheets Prepared by :Nahed Al-Salah

Intoduction F A database is needed to store information so that it can be searched and sorted in various ways. F Each item of information stored in a field. F A collection of related fields form a record. F Simple searches can often be created by allowing the user to type the required field information into a blank record and pressing a search button.

F More advanced programs usually use a query language known as SQL ( structural Query Language. F This allows users to type statements using logical operators to specify the search conditions. F MeaningLogical operator Both condition A and B are trueA.AND.B Either condition A or condition B or both are true A.OR.B Condition A is not true.NOT.A

Spreadsheet F A Spreadsheet program is used for calculating formulae. F It made up of a grid or array of rectangular boxes called cells as shown below : F The columns are labelled A,B,C… F The rows of cells numbered 1,2,3… F To refer to a particular cell e.g A1, B1,C1……… DCBA 1 2 3

F Exercises F At Textbook