Database Anatomy 9ISTT3L2 Databases
Databases <ul><li>Hold raw ‘data’ that is used as building blocks to build information we want </li></ul><ul><li>Large dat...
Where are they hiding?
Accessing a database <ul><li>How fast is my DSL? </li></ul><ul><li>Well to find out I need to test it. </li></ul><ul><li>T...
Structures of a database <ul><li>A database stores ‘data’ in a TABLE. </li></ul><ul><li>A table consists of ROWS and COLUM...
A table of rows and columns
A simple TABLE A MS Excel Worksheet is in fact a TABLE of data. It can be used in a DATABASE easily. It has ROWS, COLUMNS ...
EXCELL is… <ul><li>It is called a FLAT FILE DATABASE </li></ul><ul><li>It has the characteristics of a Database </li></ul>...
 
FIELDS A FIELD is the name given to a piece of data in a cell. DATABASES use fields to allow data to be added/deleted and ...
RECORDS A record is a complete ‘piece’ of information in a DATABASE. For example … Here we have 3 fields … what are they? ...
Summary <ul><li>Key terms to define (know) at this stage. </li></ul><ul><li>DATABASE </li></ul><ul><li>DATA verses INFORMA...
Activity 2 <ul><li>Using your survey </li></ul><ul><li>Identify the  FIELDS  that you asked people to fill in </li></ul><u...
 
Homework <ul><li>Open a selling item on eBay (or use this one as an example) </li></ul><ul><li>Identify the  FIELDS  of da...
Extension and further reading <ul><li>Click here for  database information  res </li></ul>
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9 Istt3 L2 Databases Basic Anatomy

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IST Lesson 1 - Basic introduction to the concepts of a database with teacher led class discussion points.

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9 Istt3 L2 Databases Basic Anatomy

  1. 1. Database Anatomy 9ISTT3L2 Databases
  2. 2. Databases <ul><li>Hold raw ‘data’ that is used as building blocks to build information we want </li></ul><ul><li>Large databases and small databases all use the same theory of operation. </li></ul><ul><li>Some databases are huge (Google) </li></ul><ul><li>Some databases ‘talk’ to other databases </li></ul><ul><li>We put data in, and get information out most of the time. </li></ul>
  3. 3. Where are they hiding?
  4. 4. Accessing a database <ul><li>How fast is my DSL? </li></ul><ul><li>Well to find out I need to test it. </li></ul><ul><li>To do that I need to use a database to find a website that does it (Google) </li></ul><ul><li>And that website will have a database of where I can go to do the test. </li></ul><ul><li>Here is a test </li></ul>
  5. 5. Structures of a database <ul><li>A database stores ‘data’ in a TABLE. </li></ul><ul><li>A table consists of ROWS and COLUMNS </li></ul><ul><li>All the data in the table is entered, stored and retrieved in a CELL </li></ul><ul><li>A CELL is one single piece of data in a table </li></ul><ul><li>A cell is referenced by its postion in a ROW and a COLUMN </li></ul>
  6. 6. A table of rows and columns
  7. 7. A simple TABLE A MS Excel Worksheet is in fact a TABLE of data. It can be used in a DATABASE easily. It has ROWS, COLUMNS and CELLS We can put information into a CELL Each Cell has a reference A1 or C13
  8. 8. EXCELL is… <ul><li>It is called a FLAT FILE DATABASE </li></ul><ul><li>It has the characteristics of a Database </li></ul><ul><li>ROWS, COLUMNS, CELLS </li></ul><ul><li>It only has one TABLE </li></ul><ul><li>So all the data has to be entered into a single TABLE. </li></ul><ul><li>Each ROW is a RECORD </li></ul><ul><li>Each COLUMN is a FIELD. </li></ul>
  9. 10. FIELDS A FIELD is the name given to a piece of data in a cell. DATABASES use fields to allow data to be added/deleted and modified. DATABASES search for data using these FIELDS Over on the left, identify the THREE fields that are being used to record data.
  10. 11. RECORDS A record is a complete ‘piece’ of information in a DATABASE. For example … Here we have 3 fields … what are they? Data is entered in a row that corresponds to a field. How many RECORDS are in this database TABLE?
  11. 12. Summary <ul><li>Key terms to define (know) at this stage. </li></ul><ul><li>DATABASE </li></ul><ul><li>DATA verses INFORMATION </li></ul><ul><li>TABLE </li></ul><ul><li>ROW, COLUMN </li></ul><ul><li>CELL </li></ul><ul><li>FIELD </li></ul><ul><li>RECORD </li></ul>
  12. 13. Activity 2 <ul><li>Using your survey </li></ul><ul><li>Identify the FIELDS that you asked people to fill in </li></ul><ul><li>Create these FIELDS in Excel (using COLUMNS ) </li></ul><ul><li>Highlight the fields using BOLD RED </li></ul><ul><li>Enter the responses you have as RECORDS . </li></ul><ul><li>There is NO need to enter the questions again in EXCEL – they do need to be put on your WORDPRESS site. </li></ul>
  13. 15. Homework <ul><li>Open a selling item on eBay (or use this one as an example) </li></ul><ul><li>Identify the FIELDS of data that are being displayed. </li></ul><ul><li>Identify the TYPE of data in each of these fields. </li></ul><ul><li>Print/Screenshot an annotated diagram to illustrate your identification </li></ul>
  14. 16. Extension and further reading <ul><li>Click here for database information res </li></ul>
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