0
"id" "type" "parent" "country" "votes" "perCent"
"1" "1" "0" "US" "100" "0"
"2" "1" "0" "US" "50" "0"
"3" "100" "0" "US" "150" "0" ->150 = sum(votes) where type = 1 and country = country
"4" "1" "0" "SE" "50" "0"
"5" "1" "0" "SE" "25" "0"
"6" "100" "0" "SE" "75" "0" ->75 = sum(votes) where type = 1 and country = country
我試圖更新type=100
所有type=1
爲各自國家的總和()。的MySQL更新行
我一直在努力與這個SQL,似乎無處可去。基本上,我想要做的是更新投票,其中type = 100與他們各自國家的類型總和= 1。 我一直在試圖調整這一點,但似乎完全失敗。你能幫忙嗎?
UPDATE likes p
JOIN likes h
ON p.country = h.country
AND (p.type=1) AND h.type=1
SET p.votes=sum(h.votes) where p.type=100;