一个表中的多个计数永久汇总行中的列

Question

I'm trying to get the number of hits for each day during a break to all show up in one table.

SELECT module, COUNT( * ) 
FROM mdl_log AS l
WHERE (FROM_UNIXTIME( l.`time` ) BETWEEN  '2014-12-16 00:00:00' AND '2014-12-17 00:00:00')
GROUP BY module

Gives me exactly what I need for one day (the 16th)

module  Count(*)
admin   11
assign  1
course  20
outcome 2
user    3

But when I try to get multiple days in the same table it give me a sum of the column in each row.

SELECT module 

 ,(SELECT COUNT( * ) 
FROM mdl_log as l
WHERE (FROM_UNIXTIME( l.`time` ) BETWEEN  '2014-12-12 00:00:00' AND '2014-12-13 00:00:00')
) AS "12/12/2014"

,(SELECT COUNT( * ) 
FROM mdl_log AS l
WHERE (FROM_UNIXTIME( l.`time` ) BETWEEN  '2014-12-16 00:00:00' AND '2014-12-17 00:00:00')
) AS "12/16/14"

FROM mdl_log 
group by module 

This...

module 12/12/14  12/16/14
admin      1    37
assign     1    37
calendar   1    37
course     1    37
forum      1    37
grade      1    37
hsuforum   1    37
library    1    37
login      1    37
lti        1    37
message    1    37
outcome    1    37
question   1    37
quiz       1    37
role       1    37
url        1    37
user       1    37
webservice  1   37
workshop    1   37

Can you give me any advice on how to get this so it shows up how I want it? eg

module  12/12/14  12/16/14
admin   1         11
assign  0         1
user    0         3

etc.

Answer 1

Apply the date criterion inside the count function:

SELECT module, 
COUNT(IF(FROM_UNIXTIME( l.`time` ) BETWEEN  '2014-12-12 00:00:00' AND '2014-12-13 00:00:00', 1, NULL) AS "12/12/2014",
COUNT(IF(FROM_UNIXTIME( l.`time` ) BETWEEN  '2014-12-16 00:00:00' AND '2014-12-17 00:00:00', 1, NULL) AS "12/16/2014"
FROM mdl_log 
group by module