僅在mysql中的特定列上變得與眾不同

Question

我正在嘗試選擇具有“響應”的不同列的行，但是這樣做很麻煩。 請看一下我的代碼：

select distinct input,response,
((response REGEXP '[[:<:]]a[[:>:]]')+(response REGEXP '[[:<:]]have[[:>:]]')+(response REGEXP '[[:<:]]I[[:>:]]')) as wordsFound, 
(LENGTH(response) - LENGTH(REPLACE(response, ' ', ''))+1) AS wordsCount 
FROM allData 
HAVING wordsFound > 0 
order by wordsFound desc, wordsCount asc, rand() LIMIT 30

如果刪除查詢中的“輸入”列，則可以使用，但我也想選擇“輸入”列。 如果我在響應旁邊放一個distinct關鍵字，它將顯示一個錯誤。 我該怎么做才能獲得列“輸入”和不同的列響應？

Answer 1

您想使用GROUP BY子句代替DISTINCT 。

select input,response,
((response REGEXP '[[:<:]]a[[:>:]]')+(response REGEXP '[[:<:]]have[[:>:]]')+(response REGEXP '[[:<:]]I[[:>:]]')) as wordsFound, 
(LENGTH(response) - LENGTH(REPLACE(response, ' ', ''))+1) AS wordsCount 
FROM allData
GROUP BY response 
HAVING wordsFound > 0 
order by wordsFound desc, wordsCount asc, rand() LIMIT 30