[英]sub query solution for join
i have following query which gives me error when i run it, 我有以下查询,当我运行它时给我错误,
SELECT events.id AS id, SUM(tickets_sold.quantity)
FROM (`events`)
JOIN `category` AS cat ON `events`.`category_id` = `cat`.`id`
JOIN `category` AS sub_cat ON `events`.`subCategoryID` = `sub_cat`.`id`
JOIN `events_custom_dates` AS events_date ON `events_date`.`event_id` = `events`.`id`
JOIN `my_promos` ON `events`.id = `my_promos`.`event_id`
LEFT JOIN `mycalendar` ON `mycalendar`.`event_id` = `my_promos`.`event_id`
LEFT JOIN `promo_events_stats` ON `promo_events_stats`.`id` = `events`.`id`
JOIN `tickets_sold` ON `my_promos`.`link_code` = `tickets_sold`.`code`
WHERE `my_promos`.`user_id` = '532' AND DATE(my_promos.date) >= '2013-11-01' AND DATE(my_promos.date) <= '2014-01-22'
GROUP BY my_promos.event_id
it gives me 它给我
id sum(tickets.sold)
some id `2`
some id `4`
some id `14`
but it should give 但它应该给
some id `2`
some id `4`
some id `7`
when i remove the following line from the above query it gives me right data 当我从上述查询中删除以下行时,它为我提供了正确的数据
JOIN `events_custom_dates` AS events_date ON `events_date`.`event_id` = `events`.`id`
so please tell me what should i do now.. event_id is the only foreign key against which i can makes its join with events table. 所以请告诉我我现在应该怎么做。event_id是唯一的外键,可以使它与事件表连接。
here is your require solution 这是您需要的解决方案
SELECT events.id AS id,A.sold_tickets
FROM (`events`)
JOIN `category` AS cat ON `events`.`category_id` = `cat`.`id`
JOIN `category` AS sub_cat ON `events`.`subCategoryID` = `sub_cat`.`id`
JOIN `events_custom_dates` AS events_date ON `events_date`.`event_id` = `events`.`id`
JOIN `my_promos` ON `events`.id = `my_promos`.`event_id`
LEFT JOIN `mycalendar` ON `mycalendar`.`event_id` = `my_promos`.`event_id`
LEFT JOIN `promo_events_stats` ON `promo_events_stats`.`id` = `events`.`id`
LEFT JOIN (SELECT my_promos.event_id, SUM(tickets_sold.quantity) AS sold_tickets FROM my_promos
JOIN tickets_sold ON tickets_sold.code = my_promos.link_code
WHERE my_promos.user_id = '532' AND DATE(my_promos.date) >= '2013-11-01' AND DATE(my_promos.date) <= '2014-01-22'
GROUP BY my_promos.event_id) A ON A.event_id = events.id
WHERE `my_promos`.`user_id` = '532' AND DATE(my_promos.date) >= '2013-11-01' AND DATE(my_promos.date) <= '2014-01-22'
GROUP BY my_promos.event_id
Does 是否
select *
from events
join events_custom_dates as events_date on events_date.event_id = events.id;
give the result you're expecting? 给出您期望的结果? I expect there could be a problem with the schema, but without being able to see it, that's a bit of a stab in the dark.
我希望模式可能有问题,但是如果看不到它,那将是一团黑暗的事。
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