How to get more columns from MAX(ID), MIN(ID)
MYSQL query?
Currently I get only two values: MAX(ID) & MIN(ID)
from this query:
SELECT MIN(ID), MAX(ID)
FROM mytable
WHERE mytable.series = 'white'
;
Need to get something like this-pseudo-query:
SELECT column1, column2
FROM mytable
WHERE series = 'white'
AND ID=Max(ID)
'AND GET ME ALSO'
WHERE series = 'white'
AND ID=Min(ID);`
It should return 2 rows for the column 'series' that equals 'white'.
1st with column1 and column2 for ID=Min(ID). 2nd with column1 and column2 for ID=Max(ID).
But how?
Here is an approach using UNION
:
SELECT column1, column2
FROM mytable
WHERE series = 'white' AND ID IN
(
SELECT MIN(ID) FROM mytable WHERE series = 'white'
UNION
SELECT MAX(ID) FROM mytable WHERE series = 'white'
)
For good performance add a combined index on (series, id)
.
Or another variation which may have better performance:
(
SELECT column1, column2
FROM mytable
WHERE series = 'white'
ORDER BY ID
LIMIT 1
)
UNION
(
SELECT column1, column2
FROM mytable
WHERE series = 'white'
ORDER BY ID DESC
LIMIT 1
)
This will also be able to use the combined index on (series, id)
.