Question

05214M  2   BRAKE PAD METAL EACH    1992    POLARIS 400 XC/ XCR 
05214M  2   BRAKE PAD METAL EACH    1991    POLARIS 400 XC/ XCR

您好了上面的数据我试图获取具有相同部件号（05214M）和相同型号（POLARIS 400 XC / XCR）的所有行，并使用年份和型号创建标题。

所以我希望这个的标题是

BRAKE PAD METAL POLARIS 400 XC/ XCR 1991-1992

这可以使用SQL吗？

Answer 1

使用min max和group by

  select  model, concat( min(`year`) , '-', max(`year`))
  from  my_table 
  group by model

如果你想要一个特定的模型，你可以使用where

  select  model, concat( min(`year`) , '-', max(`year`))
  from  my_table 
  where model = '05214M'
  group by model

如果你想要一个具有单行的模型的不同结果，并且模型包含多行，你可以使用这样的联合

  select  model, concat( min(`year`) , '-', max(`year`))
  from  my_table 
  group by model
  having count(*)>1 
  union 
  select  model, `year`
  from  my_table 
  group by model
  having count(*) = 1

Answer 2

如果由于某种原因您不能使用组，您也可以使用这样的窗口函数来执行此操作：

SELECT model,
       CAST(min(year) over (partition by model order by year) as varchar(4)) + '-' +
       CAST(max(year) over (partition by model order by year) as varchar(4)) as Date_Range
FROM atable

Answer 3

使用concat和group by

select concat(item,' ',model,' ',Min(year),'-',Max(year)) as title   
from Table_name   
group by sku;

如何使用SQL select语句实现此结果

3 个答案: