SQL - 通過ID字段

Question

我有一個select語句從哪裏獲得

ProductID Gender Color Type  AgeRange 
344842  Boys NULL NULL  NULL  
344842  NULL Black NULL  NULL 
344842  NULL NULL Leggings NULL 
344842  NULL NULL NULL  2 to 4 Years 

我希望得到合併，這樣

ProductID Gender Color Type  AgeRange 
344842  Boys Black Leggings 2 to 4 Years 

Answer 1

select 
productid, max(Gender) as Gender, 
max(Color) as Color, max(Type) as Type, max(AgeRange) as AgeRange 
from 
table 
group by 
productid 

Answer 2

行你可以嘗試這樣的

合併記錄

select productid, max(gender) as gender, max(color) as color, max(type) as Type, max(AgeRange) as AgeRange 
from yourtable group by ProductId 

Answer 3

select id,max(gender) gender, max(color) color, max(Type) Type, max(AgeRange) AgeRange from yourtable group by id