我有四张桌子:
我如何为每个用户分别处理每个批处理,从这些批处理ID的每个批处理日志中经过的总数以及该批处理的每个任务ID的总估计值?
编辑:
TABLES:
task
id estimated_nonrecurring estimated_recurring batch_id
batch
id operation_id date_entered
batch_log
id userid batch_id time_elapsed
operation
id name
我在想:
get each user;
get a list of distinct batch_ids that they worked on;
get a sum of all the time_elapsed from each batch_log for those batch id;
get all the non_recurring and the recurring for each task with each batch_id;
so that the result is like
userid, operation, batch_id, total_elapsed, total_estimate, date_entered
这样做的原因是可以向用户评估他们的工作效率,并在excel中使用这些查询。我想我可能不得不提出两个问题:
答案 0 :(得分:1)
从t_taskid = bl.taskid上的batch_log bl内部联接任务t中选择明显的bl.userid,t.batchid;
选择sum(bl.time_spent),b.batchid来自批次b左连接任务t on b.batchid = t.batchid inner join batch_log bl on bl.taskid = t.taskid;
选择sum(t.estimate),b。batchid来自批次b左连接任务t on b.batchid = t.batchid;
为什么它被称为batch_log,但它是关于任务和花费的时间?
答案 1 :(得分:1)
我不确定你们桌子的结构,但是这样的事情应该有效:
select batch.id,
(select sum(batch.time)
from batch_log
inner join task on task.id = batch_log.id
where task.batchId = batch.id) as total,
(select sum(task.estimate ) from task where task.batchId = batch.id) as estimate
from batch
inner join task on task.batchId = batch.id
where batch_log.userId = @userId
答案 2 :(得分:1)
类似的东西:
SELECT bl.UserId, b.name, t.estimate
FROM batch_log as bl
JOIN batches as b
ON b.id = bl.batch_id
JOIN task as t
ON t.id = b.task_id
WHERE bl.UserId = 123
很难说没有任何类型的表结构。