Tuesday, December 11, 2012

Load timezone data by city and country into MySQL

If ever you needed to look-up timezone data in your MySQL database you know that you need to find a nice source for that data and load it into your database.

This is how I did it:
  1. Download timezone information by cities from this site: http://citytimezones.info/cms/pending_requests.htm (this example uses the CSV format - download that file)
  2. Unzip the file and note the location (full path) of the "cities.txt" file.
  3. Use the following SQL to create a table to hold the data:
    CREATE TABLE `timezone_cities` (
      `city` varchar(100) NOT NULL,
      `timezone` varchar(250) NOT NULL,
      `country` varchar(45) NOT NULL,
      `latitude` double NOT NULL,
      `longitude` double NOT NULL,
      `timezone_name` varchar(200) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
    
  4. Adapt and run the following SQL statement in MySQL to load the data:
    LOAD DATA LOCAL INFILE '/Users/nerd/Downloads/cities_csv/cities.txt'
    INTO TABLE timezone_cities
    FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
    LINES TERMINATED BY '\r\n';
    

Make sure that when you run the LOAD DATA query, that there are no errors or warnings.
Note that I did not optimize the design of the table (field sizes) to match the data ( DIY )

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