https://github.com/delonnewman/relational

Relational programming for Ruby
https://github.com/delonnewman/relational

csv csv-import data data-analysis database export json relational relational-algebra relational-database relational-model relational-programming reporting reports ruby yaml

Last synced: about 1 month ago
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Relational programming for Ruby

• Host: GitHub
• URL: https://github.com/delonnewman/relational
• Owner: delonnewman
• Created: 2019-05-08T17:44:18.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2020-03-10T03:58:07.000Z (over 6 years ago)
• Last Synced: 2025-06-13T09:45:00.829Z (12 months ago)
• Topics: csv, csv-import, data, data-analysis, database, export, json, relational, relational-algebra, relational-database, relational-model, relational-programming, reporting, reports, ruby, yaml
• Language: Ruby
• Homepage:
• Size: 38.1 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
Relational

==========

Relational programming for Ruby

Synopsis

========

```ruby

relational do

  people = from('path/to/people.csv', schema: {created_at: :datetime, name: :string}).where(->(row) { person.created_at > Date.today - 1 })

  users = from('path/to/usernames.json').select(:id, :name)

  people.join(users).select(:id, :name, :created_at).rename(:id, :user_id).to('path/to/report.csv')

end

```

or

```ruby

Relational.from('path/to/people.csv')

          .join(Relational.from('path/to/usernames.json'))

          .select(:id, :name, :created_at)

          .rename(:id, :user_id)

          .to('path/to/data-export.json')

```