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 notEquals (children 1)
    ExpressionList (children 2)
     Function toYYYYMM (children 1)
      ExpressionList (children 1)
       Identifier dt
     Literal UInt64_202312
   Set
