Read the notes about this table.
From SQLZoo
The world
table.
Some points to note:
- There is a table called
world
with nearly 200 records. - The first record is
Afghanistan
inAsia
- The final record is
Zimbabwe
inAfrica
. - The table has eight columns or
attributes
. These are:Field Type 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) Land area in square kilometers population decimal(11,0) Number of people living in the country gdp decimal(14,0) Total annual values of goods and services in US dollars capital varchar(60) Name of the capital city tld varchar(5) Top level internet domain flag varchar(255) A link to an image of the flag wikiref varchar(255) The wikidata.org refence for the country - this is our main source for this table
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 |
Original source
This data has been collected from http://www.wikidata.org - it may be a little out of date. 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.
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.
Language: | English • Deutsch |
---|