Difference between revisions of "2015 UK General Election using mysql"

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This tutorial assumes you have access to a Linux account with mysql. Napier students can use the machine inf08104.napier.ac.uk
This tutorial assumes you have access to a Linux account with mysql. Napier students can use the machine inf08104.napier.ac.uk
==Get to the linux prompt and download the csv==
==Get to the linux prompt and download the csv (Napier students can skip this step)==
The command '''wget''' is part of Linux. You can use it to download web pages as files. (If you don't have wget you may have '''lwp-request''' or '''curl''' these do the same job)
  wget http://researchbriefings.files.parliament.uk/documents/CBP-7186/hocl-ge2015-results-full.csv
  wget http://researchbriefings.files.parliament.uk/documents/CBP-7186/hocl-ge2015-results-full.csv
Now move this file to somewhere where the MySQL process can see it (mysql doesn't have read access to your file space)
==Move the file to shared space==
The server process may not be able to read data in your home directory; you can move the file to a place that mysqld can read - '''/tmp''' is a handy place for this kind of thing.
  mv hocl-ge2015-results-full.csv /tmp
  mv hocl-ge2015-results-full.csv /tmp
Again, this is a linux command - nothing to do with mysql.
[[File:putty1.png]]
[[File:putty1.png]]
==Go into mysql and create a table for the results==
==Go into mysql and create a table for the results==
  mysql -u 40000036 -ptiger 40000036
  mysql -u 40000036 -ptiger 40000036

Revision as of 19:27, 19 October 2016

This tutorial assumes you have access to a Linux account with mysql. Napier students can use the machine inf08104.napier.ac.uk

Get to the linux prompt and download the csv (Napier students can skip this step)

The command wget is part of Linux. You can use it to download web pages as files. (If you don't have wget you may have lwp-request or curl these do the same job)

wget http://researchbriefings.files.parliament.uk/documents/CBP-7186/hocl-ge2015-results-full.csv

Move the file to shared space

The server process may not be able to read data in your home directory; you can move the file to a place that mysqld can read - /tmp is a handy place for this kind of thing.

mv hocl-ge2015-results-full.csv /tmp

Again, this is a linux command - nothing to do with mysql. Putty1.png

Go into mysql and create a table for the results

mysql -u 40000036 -ptiger 40000036

The create table statement could be:

CREATE TABLE ge(
  ons_id VARCHAR(10),
  ons_region_id VARCHAR(10),
  constituency_name VARCHAR(50),
  county_name VARCHAR(50),
  region_name VARCHAR(50),
  country_name VARCHAR(50),
  constituency_type VARCHAR(10),
  party_name VARCHAR(50),
  party_abbreviation VARCHAR(50),
  firstname VARCHAR(50),
  surname VARCHAR(50),
  gender VARCHAR(6),
  sitting_mp VARCHAR(3),
  former_mp VARCHAR(3),
  votes INT,
  `share` FLOAT,
  `change` VARCHAR(20),
  PRIMARY KEY(ons_id,firstname,surname)
);

You can import the data using this line

LOAD DATA INFILE '/tmp/hocl-ge2015-results-full.csv' INTO TABLE ge COLUMNS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\r\n' IGNORE 1 LINES;

Now let's look at some data. How many female candidates were there?

select count(1) from ge where gender='female';

Who stood in Edinburgh South?

select surname,votes from ge where constituency_name='Edinburgh South';