Question

Is it possible to do several aggregate functions inside a single query

I know whe can use

SELECT SUM(value) FROM mytable WHERE date  between '2012-05-01' AND '2012-06-01'

I’ve been trying to make an example

CREATE TABLE mytable
    (id varchar(10), value int, `date` date, situation varchar(10) ) ;

INSERT INTO mytable
    (id, value, date, situation)
VALUES
    ('id0', 1338, '2012-05-14','Urgent'),
    ('id0', 3572, '2012-05-13','Urgent'),
    ('id0', 3232, '2012-05-06','Urgent'),
    ('id0', 3068, '2012-05-05','Post'),
    ('id0', 3363, '2012-05-04','Urgent'),
    ('id0', 2022, '2012-04-28','Anual'),
    ('id0', 3193, '2012-04-24','Post')

But is it possible to use the same query to get other aggregate values?

SELECT SUM(value),SUM(value),Count(*) FROM mytable WHERE date  between '2012-05-01' AND '2012-06-01', WHERE date  between '2012-05-01' AND '2012-10-01', Where situation like 'Urgent' 

instead of 3 queries:

SELECT SUM(value) FROM mytable WHERE date  between '2012-05-01' AND '2012-06-01'
SELECT SUM(value) FROM mytable WHERE date  between '2012-05-01' AND '2012-10-01'
SELECT Count(*)   FROM mytable Where situation like 'Urgent'

Answer 1

use case

select
    sum(case when date between '2012-05-01' AND '2012-06-01' then value else 0 end) as sum1,
    sum(case when date between '2012-05-01' AND '2012-10-01' then value else 0 end) as sum2,
    sum(case when situation like 'Urgent' then 1 else 0 end) as count1
from mytable