SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Function date_trunc (children 1)
     ExpressionList (children 2)
      Literal \'month\'
      Identifier d
    Function SUM (children 1)
     ExpressionList (children 1)
      Identifier c
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier f2
     Literal \'x\'
   ExpressionList (children 1)
    Literal UInt64_1
