Read the notes about this table.

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The world table.

Some points to note:

  • There is a table called world with nearly 200 records.
  • The first record is Afghanistan in Asia
  • The final record is Zimbabwe in Africa.
  • The table has eight columns or attributes . These are:
    FieldTypeNullKeyDefaultNotes
    namevarchar(50)The English name of the country - this is the primary key.
    continentvarchar(60)Not strictloy continent - but these include all your favourite continents (Europe, Asia etc) plus a few others.
    areadecimal(10,0)YESnull
    populationdecimal(11,0)YESnull
    gdpdecimal(14,0)YESnull
    capitalvarchar(60)YESnull
    tldvarchar(5)YESnull
    flagvarchar(255)YESnull

An extract from the table world

name region area population gdp
Yemen Middle East 536869 21500000 12255000000
Zambia Africa 752614 11000000 4950000000
Zimbabwe Africa 390759 12900000 6192000000

Footnotes

Per Capita GDP

The per capita GDP is the GDP divided by the population. It is a rough measure of the average salary. A rich country is one with a high per capita GDP.

Original source

This data has been collected from http://www.wikidata.org - it may be a little out of date. The latest version can be found at Some changes have been made to the data - the reader should assume that errors and omissions are due to me and not the most excellent wikidata site.

Area

The area is measured in square kilometers.

GDP


Scientific Notation

Some implementations of SQL may show large numbers in scientific notation. The number 6.23 E9 means 6.23 x 10 9 which is 6.23 x 1,000,000,000 which is 6,230,000,000
A Million is 10 6 which is 1,000,000
A Billion is 10 9 which is one thousand million which is 1,000,000,000
A Trillion is 10 12 , which is one million million which is 1,000,000,000,000.


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