Flowdock
method

columns_for_distinct

Importance_1
Ruby on Rails latest stable (v4.0.2) - 0 notes - Class: ActiveRecord::ConnectionAdapters::SchemaStatements
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columns_for_distinct(columns, orders) public

Given a set of columns and an ORDER BY clause, returns the columns for a SELECT DISTINCT. Both PostgreSQL and Oracle overrides this for custom DISTINCT syntax - they require the order columns appear in the SELECT.

columns_for_distinct("posts.id", ["posts.created_at desc"])
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