包含group_concat的mysql select语句

Question

我有一个像这样的mysql语句

SELECT distinct mk.gene as gene, qs.rs as snp, CONCAT (qs.A1, qs.A2) as genotype
FROM dallas.QS_base qs  cross join   
dallas.staging mk 
     ON qs.rs = mk.rs 
WHERE qs.sampleID = 'mydna' 
order by gene ASC;

返回此类输出

'ACE'    'RS4343',    'AA'
'ACTN3'  'RS1815739'  'TC'

从这种类型的表（dallas.staging）

'heart health', 'ACE', 'RS4343'
'skin health', 'ACE', 'RS4343'
'sports performance', 'ACE', 'RS4343'
'sports performance', 'ACTN3', 'RS1815739'
'longevity', 'ACTN3', 'RS1815739'

这个（dallas.QS_base）

'mydna','RS4343','A','A'
'mydna','RS1815739','T','C'

我应该如何更改上面的mysql语句以使我能够获得此输出？我相信我需要使用group_concat命令。

'ACE'    'RS4343',    'AA' '(heart health, sports performance, skin health)'
'ACTN3'  'RS1815739'  'TC' '(sports performance, longevity)'

Answer 1

这个查询应该为你做的工作（注意mk.gene上的不同是没有必要的，因为你正在按它分组）：

SELECT mk.gene as gene, qs.rs as snp, CONCAT (qs.A1, qs.A2) as genotype, GROUP_CONCAT(mk.condition) AS conditions
FROM QS_base qs  cross join   
staging mk 
     ON qs.rs = mk.rs 
WHERE qs.sampleID = 'mydna'
group by gene
order by gene ASC;

输出：

gene    snp         genotype    conditions
ACE     RS4343      AA          heart health,sports performance,skin health
ACTN3   RS1815739   TC          sports performance,longevity