Solution for Poll DB 1: Queries

Poll_DB_1:_Queries_solution.rb

# Solution for Challenge: Poll DB 1: Queries. Started 2013-07-08T21:40:24+00:00

SELECT * FROM congress_members;
SELECT sql FROM   (SELECT sql sql, type type, tbl_name tbl_name, name name, rowid x     FROM sqlite_master UNION ALL   SELECT sql, type, tbl_name, name, rowid FROM sqlite_temp_master) WHERE type!='meta' AND sql NOTNULL AND name NOT LIKE 'sqlite_%'ORDER BY substr(type,2,1), CASE type WHEN 'view' THEN rowid ELSE name END
SELECT * FROM congress_members
WHERE id='524';

SELECT * FROM votes
WHERE politician_id = '524';
SELECT count(id) FROM votes
WHERE politician_id='524';

select count(congress_members.id) from votes
join congress_members
on congress_members.id=votes.politician_id
where congress_members.name like '%Olympia%';

select count(congress_members.id) from votes
join congress_members
on congress_members.id=votes.politician_id
where congress_members.name like '%Paulsen%';

select congress_members.*, count(*) from congress_members
join votes
on congress_members.id=votes.politician_id
group by votes.politician_id
order by count(politician_id) desc;

select congress_members.id,congress_members.name,congress_members.party, count(*) from congress_members
join votes
on congress_members.id=votes.politician_id
group by votes.politician_id
order by count(politician_id) desc;

select congress_members.id,congress_members.name,congress_members.party, count(*) from congress_members
join votes
order by count(politician_id) desc;

select congress_members.id,congress_members.name,congress_members.party, count(*) from congress_members
join votes
on congress_members.id=votes.politician_id
group by votes.politician_id
order by count(politician_id) asc;

SELECT congress_members.id, congress_members.name, congress_members.party, count(*) FROM congress_members
JOIN votes
group by votes.politician_id
order by count(politician_id) DESC limit 1;

SELECT congress_members.id, congress_members.name, congress_members.party, count(*) FROM congress_members
JOIN votes
on congress_members.id=votes.politician_id
group by votes.politician_id
order by count(politician_id) DESC limit 1;

SELECT congress_members.name,congress_members.location,congress_members.grade_1996, count(*) FROM congress_members
JOIN votes
on congress_members.id=votes.politician_id
group by votes.politician_id
order by count(politician_id) DESC limit 1;

SELECT * FROM congress_members;

SELECT * FROM congress_members WHERE grade_1996 < 9;

SELECT congress_members.location, COUNT(votes.id) AS count
FROM congress_members
JOIN votes
ON congress_members.id = votes.politician_id
GROUP BY congress_members.location
ORDER BY count DESC
LIMIT 10;

select * from voters;

select * from voters limit 100;

SELECT congress_members.location, COUNT(votes.id) AS count
FROM congress_members
JOIN votes
ON congress_members.id = votes.politician_id
GROUP BY congress_members.location
ORDER BY count DESC
LIMIT 10;

SELECT congress_members.location, COUNT(votes.id) AS count
FROM congress_members
JOIN votes
ON congress_members.id = votes.politician_id
GROUP BY congress_members.location
ORDER BY count DESC
LIMIT 10;

SELECT voters.id, voters.first_name, voters.last_name, COUNT(votes.id) AS count
FROM voters
JOIN votes
ON votes.voter_id = voters.id
GROUP BY voters.id
HAVING count > 2;

SELECT voters.id, voters.first_name, voters.last_name, congress_members.id, congress_members.name, COUNT(votes.id) AS count
FROM voters
JOIN votes
ON votes.voter_id = voters.id
JOIN congress_members
ON congress_members.id = votes.politician_id
GROUP BY voters.id, congress_members.id
HAVING count > 2;

#this is the code to see the list of voters for representative with funny votes
select voters.first_name, voters.last_name, congress_members.name, count(congress_members.id) from votes
join congress_members
on congress_members.id=votes.politician_id
join voters
on voters.id = votes.voter_id
where congress_members.name like '%Whitfield%'
group by voters.id;