Equivalent of strftime in Postgres

Question

After migrating my SQLite database to Postgres on the development server, I get the

PG::UndefinedFunction: ERROR:  function strftime(unknown, date) does not         


        

Answer 1

Looks like it is a great time to start learning SQL! Made my method work using the following code:

  def self.query_by_year_month(y, m)
    where("extract(year from date) = ? and extract(month from date) = ?", y, m)
  end