多列上的MYSQL Distinct查询

Question

我想从userid上的Food Table中选择数据，但foodname应该是不同的。

我使用了以下查询

SELECT * 
FROM Food 
WHERE cfid IN (
    SELECT distinct(foodname) FROM Food WHERE userid=234
);

但它返回一组空数据。

食物表

cfid foodname            userid brand
 160 special chapati        234 homemade
 161 chicken fry special    234 kfc
 162 apple punch            234 homemade
 164 pohapokri              234 homemade
 165 pohapokri              234 homemade
 167 besan gatte            234 home made
 168 besan gatte            234 home made
 169 pohapokri              234 homemade
 172 chicken fry special    234 kfc
 174 special chapati        234 homemade
 175 special chapati        234 homemade

Answer 1

根据您的评论，在cfId上使用group by和min

select min(cfId), foodname, userid, brand
from food
group by foodname, userid, brand
--where userid=234