Question

i have a table in sqlite database like following.

    id    status

    =============
    x     0
    y     1
    y     0
    x     1
    x     1 
    z     0

As the example, i have 3 different id with status(0/1), and x was found 3 times in the table, with status=0 for 1 time, status=1 for 2 times, y was found 2 times in the table, with status=0 for 1 time and status=1 for 1 time.

so, i want to use ‘select’ to get the following result, is there any way to do this job? any help would be appreciated. thanks

    id     sum(status=0)     sum(status=1)   total(status)
    ========================================================
    x      1                  2              3
    y      1                  1              2
    z      1                  0              1

Answer 1

I believe this should work:

SELECT id, 
    SUM(CASE WHEN status = 0 THEN 1 ELSE 0 END) AS SUM_STATUS_0, 
    SUM(CASE WHEN status = 1 THEN 1 ELSE 0 END) AS SUM_STATUS_1,
    SUM(status) AS SUM_STATUS
FROM TABLE
GROUP BY id