SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier source
   Function greater (children 1)
    ExpressionList (children 2)
     Function toYYYYMM (children 1)
      ExpressionList (children 1)
       Identifier dt_32
     Literal UInt64_202312
   Set
