I'm trying to get the row with the highest/lowest number, after performing a GROUP BY
:
Here is my test data
mysql> SELECT * FROM test;
+----+-------+------+
| id | value | name |
+----+-------+------+
| 1 | 10 | row1 |
| 2 | 12 | row2 |
| 3 | 10 | row2 |
| 4 | 5 | row2 |
+----+-------+------+
4 rows in set (0.00 sec)
To get the lowest value, I'll use MIN()
mysql> SELECT id, name, MIN(value) AS value FROM test GROUP BY name;
+----+------+-------+
| id | name | value |
+----+------+-------+
| 1 | row1 | 10 |
| 2 | row2 | 5 |
+----+------+-------+
2 rows in set (0.00 sec)
Now, the id row2
is 2
, but it should be 4
.
I also tried with a join:
mysql> SELECT t1.* FROM
(SELECT id, name, MIN(value) AS value
FROM test GROUP BY name) AS t1
INNER JOIN test AS t2 ON t1.id = t2.id;
+----+------+-------+
| id | name | value |
+----+------+-------+
| 1 | row1 | 10 |
| 2 | row2 | 5 |
+----+------+-------+
2 rows in set (0.00 sec)
How can I get the correct ID for each result based on what the lowest value
is?
I think this is what you are trying to achieve:
Output:
See this SQLFiddle
DISTINCT
)Here I have self-joined the table with minVal and Name.