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Presentation transcript:

© All Rights Reserved Databases

© All Rights Reserved Databases What do you think the word ‘database’ means?

© All Rights Reserved Databases What do you think the word ‘database’ means? DEFINITION: A database is a collection of data or information which is stored in a logical and structured way

© All Rights Reserved Paper-based databases

© All Rights Reserved Paper-based databases Think of some advantages for paper-based databases

© All Rights Reserved Paper-based databases Think of some advantages for paper-based databases  Cheap to set up  Don’t need electricity, so will work if you have a power-cut  Don’t need a computer – which is expensive  Can carry them around with you  Don’t need training to learn how to use them

© All Rights Reserved Paper-based databases Think of some disadvantages for paper- based databases

© All Rights Reserved Paper-based databases Think of some disadvantages for paper- based databases  Can be lost  Can’t easily make back-up copies  Hard to update or make changes  Card systems can get in a muddle if cards not replaced in the correct order  Can take a while to search for a particular record

© All Rights Reserved Computer-based databases

© All Rights Reserved Computerised databases Think of some advantages for computerised databases

© All Rights Reserved Computerised databases Think of some advantages for computerised databases  Can easily make back-up copies  Can easily make changes  Can easily sort data into order e.g. alphabetic  Can search for particular records very quickly  Can import or export data to/from other packages

© All Rights Reserved Computerised databases Think of some disadvantages for computerised databases

© All Rights Reserved Computerised databases Think of some disadvantages for computerised databases  Can be expensive to set up if you have to get a professional to make it  If there is a power-cut, you can’t use it  You need to have a computer  Cannot carry it around with you – unless you take a computer  You often need training to learn how to use them

© All Rights Reserved Database Terms Your school keeps a lot of information about every student. Think of some of the information they keep about you.

© All Rights Reserved Database Terms Your school keeps a lot of information about every student. Think of some of the information they keep about you. name address d.o.b. phone number parent’s names doctor’s name allergies illnesses

© All Rights Reserved Field Each of these is one piece of information about you. name address d.o.b. phone number parent’s names doctor’s name allergies illnesses Each of these different types of information is called a ‘Field’

© All Rights Reserved Field Student number SurnameFirst name D.O.B.AddressPhone number IllnessesAllergiesDoctor 1042JonesEmma05/04/95123 High Street NutsDr. Brown 1043SmithLouise12/08/9545 Low Road DiabetesDr. Green 1044WhiteSimon26/06/9567 Middle Lane Wasp stings Dr. Yellow field

© All Rights Reserved Field A shop selling DVDs has a database. What would be the field names in their database?

© All Rights Reserved Field A shop selling DVDs has a database. What would be the field names in their database? title of DVD price genre actors Running time how many in stock

© All Rights Reserved Record All of the ‘fields’ are put together to make a ‘record’ A ‘record’ is all of the data about one person or one thing.

© All Rights Reserved Record Student number SurnameFirst name D.O.B.AddressPhone number IllnessesAllergiesDoctor 1042JonesEmma05/04/95123 High Street NutsDr. Brown 1043SmithLouise12/08/9545 Low Road DiabetesDr. Green 1044WhiteSimon26/06/9567 Middle Lane Wasp stings Dr. Yellow record

© All Rights Reserved Record Student number SurnameFirst name D.O.B.AddressPhone number IllnessesAllergiesDoctor 1042JonesEmma05/04/95123 High Street NutsDr. Brown 1043SmithLouise12/08/9545 Low Road DiabetesDr. Green 1044WhiteSimon26/06/9567 Middle Lane Wasp stings Dr. Yellow record field

© All Rights Reserved File Student number SurnameFirst name D.O.B.AddressPhone number IllnessesAllergiesDoctor 1042JonesEmma05/04/95123 High Street NutsDr. Brown 1043SmithLouise12/08/9545 Low Road DiabetesDr. Green 1044WhiteSimon26/06/9567 Middle Lane Wasp stings Dr. Yellow 1045WoodJames14/05/9589 Uphill Drive Dr. Black 1046WytheHannah18/04/95101 Down Avenue AsthmaPlastersDr. Blue All of the ‘records’ are stored together as a ‘file’ file

© All Rights Reserved Database Terms A ‘database’ is a collection of data or information which is stored in a logical and structured way A ‘field’ is one type or piece of information A ‘record’ is all of the information about one person or one thing A ‘file’ is the collection of all the database records on one topic or subject