COUNT（DISTINCT（CASE當尋找功能不列MySQL的

好，我快要放棄這一個COUNT（DISTINCT（CASE當尋找功能不列MySQL的

當我運行下面的查詢，我得到「錯誤代碼：。1305 FUNCTION statpurchase .playerId does not exist「。我沒有得到一個行號，但我強烈懷疑COUNT（DISTINCT（WHEN子句）

該查詢試圖計算在給定的購買的唯一playerIds的百分比一天的一段時間statpurchase.playerId是一個有效的列名稱

這是一個可憐的人責怪他的工具，但我懷疑它可能是一個解析器錯誤類似於this one。

delimiter $$ 
CREATE PROCEDURE `percentUniquesPurchasing`(in startTime datetime, in endTime datetime, in placeId int) 
BEGIN 

declare total_uniques int; 
declare iOS_uniques int; 
declare desktop_uniques int; 
declare i datetime; 
set i = startTime; 

CREATE TEMPORARY TABLE results (
    theday datetime, 
    total float, 
    iOS float, 
    desktop float 
); 



while(i < endTime + INTERVAL 1 DAY) do 



    select count(distinct(statplaysession.playerId)), 
     count(distinct(case when touchInterface = 1 then statplaysession.playerId else null end)), 
     count(distinct(case when touchInterface = 0 then statplaysession.playerId else null end)) 
    into 
     total_uniques, iOS_uniques, desktop_uniques 
    from rbxstats.statplaysession 
    where 
     statplaysession.start > i and 
     statplaysession.start < i + INTERVAL 1 DAY and 
     statplaysession.placeId = placeId; 

    insert into results (theday, total, iOS, desktop) 
    select i, 
      if(total_uniques > 0, count(distinct(statpurchase.playerId))/total_uniques, 0), 
      if(iOS_uniques > 0, count(distinct(statpurchase.playerId(case when touchInterface = 1 then statpurchase.playerId end)))/iOS_uniques, 0), 
      if(desktop_uniques > 0, count(distinct(statpurchase.playerId(case when touchInterface = 0 then statpurchase.playerId end)))/desktop_uniques,0) 
    from rbxstats.statpurchase where 
     statpurchase.timestamp > i and 
     statpurchase.timestamp < i + INTERVAL 1 DAY and 
     statpurchase.placeId = placeId; 


    set i = i + INTERVAL 1 DAY; 
end while; 

select * from results; 
drop temporary table results; 
END$$

來源

2014-01-23 John Shedletsky

在這兩條線，你試着在你的餐桌

if(iOS_uniques > 0, count(distinct(statpurchase.playerId(case when 
if(desktop_uniques > 0, count(distinct(statpurchase.playerId(case when

來源

2014-01-23 20:19:20 nisav

OH SNAP使用statpurchase.playerId作爲一個函數，它似乎沒有成爲其列。你是對的。非常感謝！ –

COUNT（DISTINCT（CASE當尋找功能不列MySQL的

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