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我想選擇不同的tagName以及那些tagNames的總和,但似乎只得到一個結果。MySql選擇不同總合產量奇怪的結果
"gId" "tagName" "tagTotal" "tagCountryCode"
"1" "metallica" "5" "US"
"2" "abba" "5" "US"
"3" "metallica" "1" "US"
"4" "abba" "1" "US"
"5" "metallica" "1" "US"
"6" "james-hetfield" "1" "US"
"7" "abba" "1" "US"
"8" "metallica" "4" "SE"
"9" "abba" "4" "SE"
我正在使用此查詢,但我失敗了。我做錯了什麼,我該怎麼做對嗎?
select distinct tagName a, sum(tagTotal) b from tags where tagCountryCode = 'US' order by b desc limit 20;
"a" "b"
"metallica" "15"
我試圖得到類似的結果:
metallica 7
abba 7
james-hetfield 1