Groupdate.sql

The simplest way to group by:

day
week
month
day of the week
hour of the day
and more (complete list at bottom)

🎉 Time zones supported!! the best part

🌎 Use it with any programming language the other best part

Supports PostgreSQL and MySQL

Usage

Groupdate.sql creates SQL functions, which are stored by the database.

You can use these functions with any ORM (or without one).

SQL

Group by day

SELECT gd_day(created_at, 'America/Los_Angeles') AS day, COUNT(*)
  FROM users GROUP BY day;
-- result
          day           | count
------------------------+-------
 2013-04-11 07:00:00+00 |   145
 2013-04-12 07:00:00+00 |    65
 2013-04-13 07:00:00+00 |   293

Group by week

SELECT gd_week(created_at, 'America/Chicago') AS week, COUNT(*)
  FROM users GROUP BY week;
-- result
          week          | count
------------------------+-------
 2013-05-05 05:00:00+00 |  1327
 2013-05-12 05:00:00+00 |  3432
 2013-05-19 05:00:00+00 |   673

Group by day of week

SELECT gd_day_of_week(created_at, 'America/New_York') AS day_of_week, COUNT(*)
  FROM orders GROUP BY day_of_week;
-- result
 day_of_week | count
-------------+-------
           0 |   167
           1 |   273
           2 |   439
           3 |   285
           4 |   318
           5 |   123
           6 |   189

Note: Weeks start on Sunday.

Language / Frameworks

Ruby on Rails (activerecord)

User.group("gd_day(created_at)").count

Django, Node.js, Go, etc

# pull requests please :)

Installation

Run this SQL

For MySQL, time zone support must be installed on the server.

mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql

Complete list

All functions are prefixed with gd_ to prevent conflicts with MySQL functions.

second
minute
hour
day
week - starts Sunday
week_mon - starts Monday
month
year
hour_of_day
day_of_week

A list of time zones can be found here

Uninstall