SQL查詢不同的記錄

Question

這是我的查詢

select  
    po.product_option_id,  
    po.product_id,  
    24 as option_id,  
    283 as option_value_id,  
    1 as quantity,  
    0 as subtract,  
    2.0000 as price,  
    '+' as price_prefix,  
    0 as points,  
    '+' as points_prefix,  
    0.00000000 as weight,  
    '+' as weight_prefix  
from oc_product_option po  
inner join oc_product_option_value pov  
on po.product_option_id = pov.product_option_id  
where po.option_id = 24  

我需要針對po.product_id的不同記錄，現在它針對相同product_id返回多個記錄

任何建議將不勝感激

Answer 1

使用mysql group by

group by po.product_id

這將為您提供針對product_id的 不同記錄

select  
    po.product_option_id,  
    po.product_id,  
    24 as option_id,  
    283 as option_value_id,  
    1 as quantity,  
    0 as subtract,  
    2.0000 as price,  
    '+' as price_prefix,  
    0 as points,  
    '+' as points_prefix,  
    0.00000000 as weight,  
    '+' as weight_prefix  
from oc_product_option po  
inner join oc_product_option_value pov  
on po.product_option_id = pov.product_option_id  
where po.option_id = 24 group by po.product_id