mysql - 选择具有最大列值的行由另一列分组而没有嵌套的 select 语句

Question

我知道这是 Select Rows with Maximum Column Value group by Another Column 的副本但我想选择具有最大列值的行，按另一列分组，但没有嵌套的选择语句，我知道可以这样做:

SELECT
    T.Name,
    T.Rank,
    T.ID
FROM MyTable T
WHERE T.Rank = (
    SELECT MAX( T1.Rank) FROM MyTable T1
    WHERE T1.Name= T.Name
)

其中 ID， 秩， Name 是表模式，我想先按 Name 对结果进行分组，然后从每个 Name 组中选择一行，具体取决于哪一个具有最高的 Rank。

附件是我要从中选择的表格示例

Answer 1

mysql> SELECT t1.nm, t1.rank,t1.id
 FROM mytable t1
 LEFT JOIN (
   SELECT nm, max(rank) as top
   FROM mytable t2
   GROUP BY nm
 ) AS t2 ON t1.nm=t2.nm AND t1.rank = t2.top
 WHERE t2.nm IS not NULL
 ORDER BY nm;

+----+------+---------+
| nm | rank | id      |
+----+------+---------+
| m  |   -1 | b7kjhsf |
| n  |   13 | d3sf    |
+----+------+---------+
2 rows in set (0.00 sec)

mysql> select * from mytable;

+----+------+----------+
| nm | rank | id       |
+----+------+----------+
| n  |   11 | asfd     |
| n  |   11 | bsf      |
| n  |   11 | zzasdfsf |
| n  |   13 | d3sf     |
| n  |   11 | effesf   |
| n  |   10 | yxxgesf  |
| n  |   11 | bkhjusf  |
| m  |   -1 | b7kjhsf  |
| m  |   -4 | cdfgabsf |
+----+------+----------+
9 rows in set (0.00 sec)