Data Elements and Tables IT Key Ideas, Dynamic Database Systems, 2002 Chapter 7

Databases Table IT Key Ideas, Dynamic Database Systems, 2002 Record Field A table or file is a collection of related data. For example, a book with pages listing the details of all the members in a club. A record, card or form, is a collection of data for one individual entity. Each record contains the same type of data. For example, the information about a single member is a record (one line of the membership page). A field is one element of data, one single attributes of the entity. For example, the member’s date of birth is a single element of data. page 75

Table IT Key Ideas, Dynamic Database Systems, 2002 of members

Record IT Key Ideas, Dynamic Database Systems, 2002 a member

Data IT Key Ideas, Dynamic Database Systems, 2002 a word, character

Database Management Systems A relational database management system consists of a number of tables. Each table stores data about a particular entity. The tables are related through common fields creating a system, from which data can be retrieved quickly and efficiently.

Data Elements IT Key Ideas, Dynamic Database Systems, 2002 a person’s surname a person’s hair colour a person’s date of birth a car’s registration number a teacher’s qualification a student’s semester grade a venue’s seat number a venue’s seating capacity page 75

Calculated Data Elements IT Key Ideas, Dynamic Database Systems, 2002 page 75 a student’s percentage (on a test) a club’s number of financial members a business’s profit in a theatre the seats available

Data Elements page 76 suggest at least six elements of data that would be stored IT Key Ideas, Dynamic Database Systems, 2002

Data Elements Exercise 7.1page 77 IT Key Ideas, Dynamic Database Systems, 2002

Stored or Calculated Fields IT Key Ideas, Dynamic Database Systems, 2002 Data ElementStored or Calculated? Lesson Date Lesson Time Instructor Swimmer Number of swimmers Date of Birth Group Number of lessons Fees paid stored calculated stored calculated stored

Data Elements & Tables page 79 suggest at least six elements of data that would be stored in a Stores table IT Key Ideas, Dynamic Database Systems, 2002 Store Number Shop Number Address Suburb Phone Number Fax Number Manager

Data Elements Exercise 7.3page 80 IT Key Ideas, Dynamic Database Systems, 2002

Data Elements Exercise 7.4page 81 IT Key Ideas, Dynamic Database Systems, 2002

Grouping Data Elements page 82 suggest at least ten fields and group them IT Key Ideas, Dynamic Database Systems, 2002

SurnameRegistration #Date Paid AddressMakeAmount Paid SuburbTypeExpiry Date Driver Licence #Engine #Renewal Period DriverVehicleRenewal Registration

Grouping Data Elements Exercise 7.5page 83 IT Key Ideas, Dynamic Database Systems, 2002

Chapter 7 ********************************