module Arel::Expressions

Public Instance Methods

average() click to toggle source
# File lib/arel/expressions.rb, line 19
def average
  Nodes::Avg.new [self], Nodes::SqlLiteral.new('avg_id')
end
count(distinct = false) click to toggle source
# File lib/arel/expressions.rb, line 3
def count distinct = false
  Nodes::Count.new [self], distinct
end
extract(field) click to toggle source
# File lib/arel/expressions.rb, line 23
def extract field
  Nodes::Extract.new [self], field
end
maximum() click to toggle source
# File lib/arel/expressions.rb, line 11
def maximum
  Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
end
minimum() click to toggle source
# File lib/arel/expressions.rb, line 15
def minimum
  Nodes::Min.new [self], Nodes::SqlLiteral.new('min_id')
end
sum() click to toggle source
# File lib/arel/expressions.rb, line 7
def sum
  Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
end