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 greater (children 1)
    ExpressionList (children 2)
     Function toYYYYMM (children 1)
      ExpressionList (children 1)
       Identifier ts
     Literal UInt64_202312
