SQLZOO:SELECT basics

name	continent	area	population	gdp
http://3.bp.blogspot.com/-WhIR1-7fjDY/USfQczV-glI/AAAAAAAACEY/wSb7UY-Xp9o/s1600/roy.jpg	Asia	652230	25500100	20343000000
Albania	Europe	28748	2831741	12960000000
Algeria	Africa	2381741	37100000	188681000000
Andorra	Europe	468	78115	3712000000
Angola	Africa	1246700	20609294	100990000000
....

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Scandinavia

Checking a list The word IN allows us to check if an item is in a list. The example shows the name and population for the countries 'Ireland', 'Iceland' and 'Denmark'

Show the name and the population for 'Denmark', 'Finland', 'Norway', 'Sweden'

SELECT name, population FROM world
  WHERE name IN ('Ireland', 'Iceland',
                 'Denmark')

SELECT name, population FROM world
  WHERE name IN ('Denmark', 'Finland',
                 'Norway', 'Sweden')

Starts with G

What are the countries beginning with G? The word LIKE permits pattern matching - % is the wildcard. The examples shows countries beginning with D

Show each country that begins with G

SELECT name FROM world
  WHERE name LIKE 'D%'

SELECT name FROM world
  WHERE name LIKE 'G%'

Just the right size

Which countries are not too small and not too big? Show the country and the area for countries with an area between 207600 and 244820. BETWEEN allows range checking - note that it is inclusive.

Show the area in 1000 square km. Show area/1000 instead of area

SELECT name, area FROM world
  WHERE area BETWEEN 207600 AND 244820...

SELECT name, area/1000 FROM world
  WHERE area BETWEEN 207600 AND 244820

Clear your results

SELECT Quiz

You are ready for tutorial one:SELECT statements with WHERE.

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