January 20071R. Smith - qmcs 200 QMCS 200 Lecture

January 20072R. Smith - qmcs 200 Today’s Class First hourFirst hour –Homework –Review Exam –Hardware/Printers –CPU Second hour – MS AccessSecond hour – MS Access –“Look Ahead” –Creating a Table

January 20073R. Smith - qmcs 200 The Excel Exam

January 20074R. Smith - qmcs 200 Printers Common printers todayCommon printers today –Ink jet – popular for graphics Squirts ink onto the pageSquirts ink onto the page Squirting technology and ink establish the applicationSquirting technology and ink establish the application –Laser printing – workhorse printing Xerox/photocopy technologyXerox/photocopy technology Heat the paper surface, attach heat sensitive inkHeat the paper surface, attach heat sensitive ink “Toner cartridges”“Toner cartridges” OthersOthers –Impact – pretty much obsolete except for special applications –Plotters – for huge things; most are now inkjet –3D – believe it or not

January 20075R. Smith - qmcs 200 MS Access RelationshipsRelationships Reports with RelationshipsReports with Relationships “Three Rules”“Three Rules” Data “types”Data “types”

January 20076R. Smith - qmcs 200 Three Rules Include the necessary dataInclude the necessary data –Lesson: figure out everything you want to do with the database Include the fields you needInclude the fields you need –But... don‘t overdo it Store data in smallest partsStore data in smallest parts –“Smallest parts” you will use, that is (what’s the data for?) –Some are useful, some get in the way Avoid calculated fieldsAvoid calculated fields –Birthdate example –Grading example

January 20077R. Smith - qmcs 200 Data Types Most things should be “Text”Most things should be “Text” –Allows comparing, sorting, matching (case matters!) If you do arithmetic, use something elseIf you do arithmetic, use something else –Date type –Currency type –Number type(s) Different sizes and formats for different purposesDifferent sizes and formats for different purposes Using the smallest sizeUsing the smallest size –Database records add up –Each new record increases the file size –If you’re wasting space in the record, the database will get huge