blocks|key|1232276|text|从你发布的样本结果看，你只是想把计数除以1000|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1232277|SELECT+Ethnicity,+
COUNT(distinctCard.TransactionID)+/+1000+AS+CardUseCount
FROM+<rest+part+of+query>|code-block|syntax|javascript|1232278|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

From your posted sample result to me it looks like you just wanted to divide the count by 1000 like

<pre><code>SELECT Ethnicity, 
COUNT(distinctCard.TransactionID) / 1000 AS CardUseCount
FROM &lt;rest part of query&gt;
</code></pre>

blocks|key|3103539|text|我想你发的答案就是你的答案。正如他们在您的评论中所说的，您只需计算事务数，就需要将其除以事务总数。正如答案中所述，您需要将计数除以(.)按总数计算。这方面的工作如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3103540|+SELECT+Ethnicity,+COUNT(distinctCard.TransactionID)/(SELECT+COUNT(TransactionT.TransactionID)
++++++++++++++++++++++++++++++++++++++++++++++++++++++FROM+TransactionT+WHERE+CardID+<>+1)
++++AS+CardUsePercent
FROM+(SELECT+DISTINCT+TransactionID,+CustomerID+FROM+TransactionT+WHERE+CardID+<>+1)+
AS+distinctCard+INNER+JOIN+CustomerT+ON+distinctCard.CustomerID+=+CustomerT.CustomerID
GROUP+BY+Ethnicity
ORDER+BY+COUNT(distinctCard.TransactionID)+ASC|code-block|syntax|javascript|3103541|这会给出你想要的结果。|3103542|编辑:这可能是错误的，因为我不知道您的表的确切格式，但我假设TransactionID字段在表中是唯一的。否则，根据实际的执行情况，使用DISTINCT关键字或表的PK。|3103543|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I think the answer you posted is your answer. As they said in your comments , you just count the transactions, you need to divide it by the number of total transactions. As stated in the answer, you need to divide the count(...) by the total number. This would be done as follows:

<pre><code> SELECT Ethnicity, COUNT(distinctCard.TransactionID)/(SELECT COUNT(TransactionT.TransactionID)
 FROM TransactionT WHERE CardID &lt;&gt; 1)
 AS CardUsePercent
FROM (SELECT DISTINCT TransactionID, CustomerID FROM TransactionT WHERE CardID &lt;&gt; 1) 
AS distinctCard INNER JOIN CustomerT ON distinctCard.CustomerID = CustomerT.CustomerID
GROUP BY Ethnicity
ORDER BY COUNT(distinctCard.TransactionID) ASC
</code></pre>

This will give the result you want.

EDIT: This may be wrong, as i dont know the exact format of your tables, but i was assuming that the TransactionID field is Unique in the table. Else use the DISTINCT keyword, or the PK of your table , depending on your actual implemetation

blocks|key|1323890|text|SELECT+Ethnicity,+COUNT(distinctCard.TransactionID)+/+(SELECT+COUNT(1)+FROM+TransactionT+WHERE+CardID+<>+1)+AS+CardUsePer
FROM+(SELECT+DISTINCT+TransactionID,+CustomerID+FROM+TransactionT+WHERE+CardID+<>+1)+
AS+distinctCard+INNER+JOIN+CustomerT+ON+distinctCard.CustomerID+=+CustomerT.CustomerID
GROUP+BY+Ethnicity
ORDER+BY+COUNT(distinctCard.TransactionID)+ASC|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1323891|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>SELECT Ethnicity, COUNT(distinctCard.TransactionID) / (SELECT COUNT(1) FROM TransactionT WHERE CardID &lt;&gt; 1) AS CardUsePer
FROM (SELECT DISTINCT TransactionID, CustomerID FROM TransactionT WHERE CardID &lt;&gt; 1) 
AS distinctCard INNER JOIN CustomerT ON distinctCard.CustomerID = CustomerT.CustomerID
GROUP BY Ethnicity
ORDER BY COUNT(distinctCard.TransactionID) ASC
</code></pre>

blocks|key|3103545|text|如果你需要每个种族的信用卡交易百分比，你必须将每个种族的信用卡交易除以同一种族的交易总数。您不需要对此进行子查询：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3103546|SELECT+Ethnicity,+sum(IIF(CardID=1,0,1))/count(1)+AS+CardUsePercentage
FROM+TransactionT+++++
INNER+JOIN+CustomerT+
++++++ON+TransactionT.CustomerID+=+CustomerT.CustomerID
GROUP+BY+Ethnicity|code-block|syntax|javascript|3103547|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you need the percentage of card-transaction per ethnicity, you have to divide the cardtransactions per ethnicity by the total transactions of the same ethnicity. You don't need a sub query for that:

<pre><code>SELECT Ethnicity, sum(IIF(CardID=1,0,1))/count(1) AS CardUsePercentage
FROM TransactionT 
INNER JOIN CustomerT 
 ON TransactionT.CustomerID = CustomerT.CustomerID
GROUP BY Ethnicity
</code></pre>

I have looked around but I just can't seem to understand the logic. I think a good response is <a href="https://stackoverflow.com/questions/15128653/need-to-calculate-percentage-of-total-count-in-sql-query">here</a>, but like I said, it doesn't make sense, so a more specific explanation would be greatly appreciated.

So I want to show how often customers of each ethnicity are using an credit card. There are different types of credit cards, but if the CardID = 1, they used cash (hence the not equal to 1 statement).

I want to Group By ethnicity and show the count of transactions, but as a percentage. 

<pre><code>SELECT Ethnicity, COUNT(distinctCard.TransactionID) AS CardUseCount
FROM (SELECT DISTINCT TransactionID, CustomerID FROM TransactionT WHERE CardID &lt;&gt; 1) 
AS distinctCard INNER JOIN CustomerT ON distinctCard.CustomerID = CustomerT.CustomerID
GROUP BY Ethnicity
ORDER BY COUNT(distinctCard.TransactionID) ASC
</code></pre>

So for example, this is what it comes up with:

<pre><code>Ethnicity | CardUseCount
0 | 100
1 | 200
2 | 300
3 | 400
</code></pre>

But I would like this:

<pre><code>Ethnicity | CardUsePer
0 | 0.1
1 | 0.2
2 | 0.3
3 | 0.4
</code></pre>

Calculate Count as Percentage

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我环顾了四周，但我似乎无法理解逻辑。我认为是一个很好的回应，但是就像我说的那样，这是没有意义的，所以更具体的解释是非常感激的。所以我想要展示每个种族的顾客使用信用卡的频率。信用卡有不同的类型，但如果CardID = 1，则使用现金(因此不等于1语句)。我想按种族分组，并显示交易的数量，但按百分比计算。SELECT Et...

问计算计数为百分比
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