select * from information_schema.tables
  where table_rows=
  (select max(table_rows) from information_schema.tables);

select * from information_schema.tables
  order by table_rows desc limit 1;

select v1.* from information_schema.tables v1,
  (select max(table_rows) as mtr from information_schema.tables) v2
  where v1.table_rows=v2.mtr;

set @a=(select max(table_rows) from information_schema.tables);
select * from information_schema.tables where table_rows=@a;