Read the notes about this table.

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:

  Field	Type	Null	Key	Default	Notes
  name	varchar(50)	The English name of the country - this is the primary key.
  continent	varchar(60)	Not strictly continent - but these include all your favourite continents (Europe, Asia etc) plus a few others.
  area	decimal(10,0)	YES		null
  population	decimal(11,0)	YES		null
  gdp	decimal(14,0)	YES		null
  capital	varchar(60)	YES		null
  tld	varchar(5)	YES		null
  flag	varchar(255)	YES		null

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

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This data has been collected from http://www.wikidata.org - it may be a little out of date.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.

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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