我有我的產品表-name和品牌的2列,給出的數據,Mysql的組由多條選擇
NAME BRAND
'Ruby Axe Guitar', 'Guitar''s & Co'
'TV' , 'LG'
當我試圖此查詢其做工精細,
select name,brand, sum(1000) as sum,'Test' as name1
from products
group by name,brand
但我得到了,即使我不包括品牌group by
子句中的查詢工作的罰款驚訝..
select name,brand, sum(1000) as sum,'Test' as name1
from products
group by name
有人可以解釋嗎?
如果你的名字有多個值,那麼您的查詢工作不細..... – jainvikram444