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SQLZOO
1 SELECT name. Some pattern matching queries. 2 SELECT from World. In which we query the World country profile table. 3 SELECT from Nobel. Additional practice of the basic features using a table of Nobel Prize winners. 4 SELECT within SELECT. In which we form queries using otherqueries. 5
SQLZOO
1 SELECT. How to read the data from a database. 2 CREATE and DROP. How to create tables, indexes, views and other things. How to get rid of them. 3 INSERT and DELETE. How to put records into a table, change them and how to take them out again. 4 DATE and TIME. How to work with dates; adding, subtracting and formatting.SELECT BASICS
BETWEEN allows range checking (range specified is inclusive of boundary values). The example below shows countries with an area of 250,000-300,000 sq. km. Modify it to show the country and the area for countries with an area between 200,000 and 250,000. SELECT name, area FROM world WHERE area BETWEEN 250000 AND 300000. ADVENTUREWORKS EASY QUESTIONS AdventureWorks. Easy questions: 1..5. Medium questions: 6..10. Hard questions: 11..15. Resit questions: 1..5. Five easy questions. Most of these require you to use only one or two tables. You will get at most 11 points for each of the questions from this section.schema:adventure.
ADVENTUREWORKS HARD QUESTIONS AdventureWorks. Easy questions: 1..5. Medium questions: 6..10. Hard questions: 11..15. Resit questions: 1..5. schema:adventure. 11. 11. For every customer with a 'Main Office' in Dallas show AddressLine1 of the 'Main Office' and AddressLine1 of the 'Shipping' address - if there is no shipping address leave it blank.THE JOIN OPERATION
To JOIN game with eteam you could use either game JOIN eteam ON (team1=eteam.id) or game JOIN eteam ON (team2=eteam.id) Notice that because id is a column name in both game and eteam you must specify eteam.id instead of just id. List the dates of the matches and the name of the team in which 'Fernando Santos' was the team1 coach.LEFT JOIN - SQLZOO
LEFT JOIN. The SELECT .. LEFT JOIN statement. The LEFT JOIN will include rows from the left table even when the linking value is null. 1. There is no data on where the 2032 games will be held. The LEFT JOIN will include a row for 2032 even though it has no correspondingcity.
BBC QUIZ - SQLZOO
3. Select the answer which shows the problem with this SQL code - the intended result should be the continent of France: SELECT continent FROM world WHERE 'name' = 'France'. continent should be 'continent'. 'name' should be name. 'France' should be "France". 'France' should beSELECT QUIZ
Select the code that would show the countries with an area larger than 50000 and a population smaller than 10000000JOIN QUIZ 2
JOIN Quiz - part 2. 1. Select the statement which lists the unfortunate directors of the movies which have caused financial loses (gross < budget) SELECT JOIN(name FROM actor, movie ON actor.id:director WHERE gross < budget) GROUP BY name. SELECT name FROM actor INNER JOIN movie BY actor.id = director HAVING gross <budget.
SQLZOO
1 SELECT name. Some pattern matching queries. 2 SELECT from World. In which we query the World country profile table. 3 SELECT from Nobel. Additional practice of the basic features using a table of Nobel Prize winners. 4 SELECT within SELECT. In which we form queries using otherqueries. 5
SQLZOO
1 SELECT. How to read the data from a database. 2 CREATE and DROP. How to create tables, indexes, views and other things. How to get rid of them. 3 INSERT and DELETE. How to put records into a table, change them and how to take them out again. 4 DATE and TIME. How to work with dates; adding, subtracting and formatting.SELECT BASICS
BETWEEN allows range checking (range specified is inclusive of boundary values). The example below shows countries with an area of 250,000-300,000 sq. km. Modify it to show the country and the area for countries with an area between 200,000 and 250,000. SELECT name, area FROM world WHERE area BETWEEN 250000 AND 300000. ADVENTUREWORKS EASY QUESTIONS AdventureWorks. Easy questions: 1..5. Medium questions: 6..10. Hard questions: 11..15. Resit questions: 1..5. Five easy questions. Most of these require you to use only one or two tables. You will get at most 11 points for each of the questions from this section.schema:adventure.
ADVENTUREWORKS HARD QUESTIONS AdventureWorks. Easy questions: 1..5. Medium questions: 6..10. Hard questions: 11..15. Resit questions: 1..5. schema:adventure. 11. 11. For every customer with a 'Main Office' in Dallas show AddressLine1 of the 'Main Office' and AddressLine1 of the 'Shipping' address - if there is no shipping address leave it blank.THE JOIN OPERATION
To JOIN game with eteam you could use either game JOIN eteam ON (team1=eteam.id) or game JOIN eteam ON (team2=eteam.id) Notice that because id is a column name in both game and eteam you must specify eteam.id instead of just id. List the dates of the matches and the name of the team in which 'Fernando Santos' was the team1 coach.LEFT JOIN - SQLZOO
LEFT JOIN. The SELECT .. LEFT JOIN statement. The LEFT JOIN will include rows from the left table even when the linking value is null. 1. There is no data on where the 2032 games will be held. The LEFT JOIN will include a row for 2032 even though it has no correspondingcity.
BBC QUIZ - SQLZOO
3. Select the answer which shows the problem with this SQL code - the intended result should be the continent of France: SELECT continent FROM world WHERE 'name' = 'France'. continent should be 'continent'. 'name' should be name. 'France' should be "France". 'France' should beSELECT QUIZ
Select the code that would show the countries with an area larger than 50000 and a population smaller than 10000000JOIN QUIZ 2
JOIN Quiz - part 2. 1. Select the statement which lists the unfortunate directors of the movies which have caused financial loses (gross < budget) SELECT JOIN(name FROM actor, movie ON actor.id:director WHERE gross < budget) GROUP BY name. SELECT name FROM actor INNER JOIN movie BY actor.id = director HAVING gross <budget.
SQLZOO
1 SELECT. How to read the data from a database. 2 CREATE and DROP. How to create tables, indexes, views and other things. How to get rid of them. 3 INSERT and DELETE. How to put records into a table, change them and how to take them out again. 4 DATE and TIME. How to work with dates; adding, subtracting and formatting.WHERE FILTERS
Submit SQL. Restore default. SELECT name, population / area FROM bbc WHERE area > 5000000. result. 3. Where to find some very small, very rich countries. We use AND to ensure that two or more conditions hold true. SELECT name , region FROM bbc WHERE area < 2000 AND gdp > 5000000000. Submit SQL. USING GROUP BY AND HAVING. World Country Profile. GROUP BY and HAVING. By including a GROUP BY clause functions such as SUM and COUNT are applied to groups of items sharing values. When you specify GROUP BY continent the result is that you get only one row for each different value of continent.All the other columns must be "aggregated" by one of SUM, COUNT. The HAVING clause allows use to filter the groups which are SELECT FROM WORLD TUTORIAL You can use the function LEFT to isolate the first character. You can use as the NOT EQUALS operator. SELECT name, LEFT ( name, 1 ), capital FROM world. Submit SQL. Restore default. SELECT name, capital FROM world WHERE LEFT ( name, 1) = LEFT ( capital, 1) AND name capital.CREATE TABLE
The CREATE statement builds an empty table to hold rows. In this example the column yr is the PRIMARY KEY:SELECT NAMES
Find the capital and the name where the capital is an extension of name of the country. You should include Mexico City as it is longer than Mexico.You should not include Luxembourg as the capital is the same as the country.IMPORT DATA
To allow data to be imported into your system a mimic of your system can be made and then all that needs to be done is the rows from the old copy have to be deleted and then the table can be refilled with the fresh imported copy.CASE - SQLZOO
If there no conditions match (and there is not ELSE) then NULL is returned. CASE WHEN condition1 THEN value1 WHEN condition2 THEN value2 ELSE def_value END. 1. SELECT name, population ,CASE WHEN populationDetails
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