SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier source
   Function equals (children 1)
    ExpressionList (children 2)
     Function toYear (children 1)
      ExpressionList (children 1)
       Identifier dt
     Literal UInt64_2023
