我需要根据2个字段对行进行分组。
动物(a)
id group_id strain_id death_date death_cause status
-----------------------------------------------------------------------
1 512 164 2015-12-01 Culled P
2 512 164 2015-12-02 Culled A
3 512 164 2015-12-02 Surplus B
4 512 230 2015-12-06 Culled A
5 512 164 2015-12-28 Culled A
6 512 230 2016-01-20 Culled B
7 512 230 2016-01-20 Surplus P
8 512 164 NULL NULL P
9 512 230 NULL NULL B
10 512 230 NULL NULL A
11 512 164 2016-01-25 Culled B
12 512 164 2016-02-29 Culled A
13 512 230 2016-02-03 Surplus P
14 512 230 2016-02-03 Culled A
组(g)
id group_name
--------------
512 Mice
应变
id strain_name
----------------
164 Strain 1
230 Strain 2
团体动物数量(gac)
id total_animals alive_count dead_count
----------------------------------------------------------------------
512 14 3 11
交配历史(mh)
id animal_id history_type history_date
--------------------------------------------------------
1001 2 MA 2015-11-20
1002 2 MR 2015-12-01
1003 3 MA 2015-12-01
1004 6 FA 2015-12-21
1005 9 FA 2016-02-07
1006 10 MA 2016-01-27
1007 11 FA 2015-12-12
因此,当我按
strain_id
和death_cause
对它们进行分组时,这应该是它们的外观:应变1 ----剔除
1 512 164 2015-12-01 Culled P
2 512 164 2015-12-02 Culled A
5 512 164 2015-12-28 Culled A
11 512 164 2016-01-25 Culled B
12 512 164 2016-02-29 Culled A
应变1 ----剩余
3 512 164 2015-12-02 Surplus B
应变2 ----剔除
4 512 230 2015-12-06 Culled A
6 512 230 2016-01-20 Culled B
14 512 230 2016-02-03 Culled A
应变2 ----剩余
7 512 230 2016-01-20 Surplus P
13 512 230 2016-02-03 Surplus P
我想从SQL查询中得到以下结果:
g_name s_name d_cause a_total c_alive c_dead c_pup c_breeder c_total
------------------------------------------------------------------------------
Mice Strain 1 Culled 12 3 9 1 2 5
Mice Strain 1 Surplus 12 3 9 0 1 1
Mice Strain 2 Culled 12 3 9 0 1 3
Mice Strain 2 Surplus 12 3 9 2 0 2
基本上,我想使用2个类别(在这种情况下为
strain_name
和death_cause
请注意,对于要算作繁殖者(
c_breeder
)的动物,我必须查看“交配历史”表,并检查animal_id
是否曾经有以下任何一种代码MA
或FA
。我在
INNER JOIN
,groups
和group_animal_count
上使用strains
。我将LEFT JOIN
用于mating_history
,因为状态为P
的动物在该表中不会有记录,因为它们只是幼崽,不会参与交配。 最佳答案
尝试:
SELECT group_name, strain_name,death_cause, count(*) as Total
FROM ANIMALS a
JOIN GROUPS g ON a.group_id = g.id
JOIN STRAIN s ON a.strain_id = s.id
GROUP BY group_name, strain_name,death_cause