Tutorial 1: SELECT on Countries table

Quick Ref.

`BBC` Country Profiles

This tutorial introduces SQL as a query language. We will be using the SELECT command on the table bbc:

name	region	area	population	gdp
Afghanistan	South Asia	652225	26000000
Albania	Europe	28728	3200000	6656000000
Algeria	Middle East	2400000	32900000	75012000000
Andorra	Europe	468	64000
...

Using the SELECT statement.

1a. Read the notes about this table. Issue the command: SELECT name, region, population FROM bbc. Look at the output.

Results

Before attempting the following questions read this! How to use WHERE to filter records.

2a. Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros)

Results

2b. Give the name and the per capita GDP for those countries with a population of at least 200 million.

per capita GDP is the GDP divided by the population GDP/population

Results

2c. Show the name and population in millions for the countries of 'Middle East'
Divide the population by 1000000 to get population in millions.

Results

2d. Show the name and population for 'France', 'Germany', 'Italy'

Results

2e. Identify the countries which have names including the word 'United'

Results

You can play a game: Find the duplicate
You can to continue practicing the the same techniques and gain more experience of the basic skills on the Nobel table. The WHERE statement using the nobel table.
You can learn about nested statements, these are instructive and entertaining, but rarely useful. Nested SELECT statements using the bbc table.