Запрос на тип оси двух столбцов даты в sql и ее количество

Question

У меня есть два столбца, ticket_created_date и ticket_resolved_date, я хочу как-то повернуть (если можно так назвать) их с помощью запроса SQL и получить что-то похожее на изображение ниже,

1. первый столбец - это сегмент дней, т. е. 0, если разница в 2 даты меньше 1 дня, 1-2, если разница> 1

2. , следующий столбец - количество билетов, в этом случае только записи строки, каждая корзина имеет.

   

Answer 1

Вероятно, есть много способов решить эту проблему, я бы использовал GROUP BY.

Сначала вы должны получить разницу между двумя датами. Поскольку вы не указали, какую СУБД (ORACLE, SQL SERVER, My SQL, et c) вы используете, я приведу примеры для oracle и SQL SERVER.

ORACLE:

SELECT (ticket_resolved_date - ticket_created_date) AS DAYS FROM TABLE_NAME;

SQL SERVER:

SELECT DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) AS DAYS FROM TABLE_NAME;

если вы просто сгруппируете по дням и посчитаете (*), то у вас уже будет счет в день, но вы хотите создать категорию ('1-2', '3-4', et c). Для этого вы можете использовать CASE.

ORACLE:

SELECT CASE 
        WHEN (ticket_resolved_date - ticket_created_date) = 0 THEN 'A - 0'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 1 AND 2 THEN 'B - 1-2'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 3 AND 4 THEN 'C - 3-4'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 5 AND 6 THEN 'D - 5-6'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 7 AND 8 THEN 'E - 7-8'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 9 AND 10 THEN 'F - 9-10'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 11 AND 12 THEN 'G - 11-12'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 13 AND 14 THEN 'H - 13-14'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 15 AND 16 THEN 'I - 15-16'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 17 AND 18 THEN 'J - 17-18'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 19 AND 20 THEN 'K - 19-20'
        ELSE 'L - 20+'
    END AS DAYS_CATEGORY
    ,COUNT(*) AS "#TICKETS"
FROM DATES
GROUP BY CASE 
        WHEN (ticket_resolved_date - ticket_created_date) = 0 THEN 'A - 0'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 1 AND 2 THEN 'B - 1-2'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 3 AND 4 THEN 'C - 3-4'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 5 AND 6 THEN 'D - 5-6'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 7 AND 8 THEN 'E - 7-8'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 9 AND 10 THEN 'F - 9-10'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 11 AND 12 THEN 'G - 11-12'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 13 AND 14 THEN 'H - 13-14'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 15 AND 16 THEN 'I - 15-16'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 17 AND 18 THEN 'J - 17-18'
        WHEN (ticket_resolved_date - ticket_created_date) BETWEEN 19 AND 20 THEN 'K - 19-20'
        ELSE 'L - 20+'
    END
ORDER BY 1;

SQL SERVER:

SELECT CASE 
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) = 0 THEN '0'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 1 AND 2 THEN 'A - 1-2'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 3 AND 4 THEN 'B - 3-4'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 5 AND 6 THEN 'C - 5-6'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 7 AND 8 THEN 'D - 7-8'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 9 AND 10 THEN 'E - 9-10'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 11 AND 12 THEN 'F - 11-12'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 13 AND 14 THEN 'G - 13-14'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 15 AND 16 THEN 'H - 15-16'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 17 AND 18 THEN 'I - 17-18'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 19 AND 20 THEN 'J - 19-20'
        ELSE 'K - 20+'
    END AS DAYS_CATEGORY
    ,COUNT(*) AS "#TICKETS"
FROM TEST
GROUP BY CASE
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) = 0 THEN '0'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 1 AND 2 THEN 'A - 1-2'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 3 AND 4 THEN 'B - 3-4'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 5 AND 6 THEN 'C - 5-6'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 7 AND 8 THEN 'D - 7-8'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 9 AND 10 THEN 'E - 9-10'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 11 AND 12 THEN 'F - 11-12'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 13 AND 14 THEN 'G - 13-14'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 15 AND 16 THEN 'H - 15-16'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 17 AND 18 THEN 'I - 17-18'
        WHEN DATEDIFF(DAY,ticket_created_date,ticket_resolved_date) BETWEEN 19 AND 20 THEN 'J - 19-20'
        ELSE 'K - 20+'
    END
ORDER BY 1;