[英]Views from Multiple Subqueries MYSQL
I have a mathematical code that requires two subqueries. 我有一个数学代码,需要两个子查询。 Below is the copy of the code.
下面是代码的副本。
SELECT AVGTEMP_X.Average_Temp, ProduceMonAvg.Avergae_CPI,
SUM(AVGTEMP_X.Average_Temp) as AVGTEMPSUM,
SUM(ProduceMonAvg.Average_CPI) as PROCPISUM,
SUM(AVGTEMP_X.Average_Temp*AVGTEMP_X.Average_Temp) AS AVGTEMPSQ,
SUM(ProduceMonAvg.Average_CPI*ProduceMonAvg.Average_CPI)PROCPISQ,
SUM(AVGTEMP_X.Average_Temp*ProduceMonAvg.Average_CPI) AS PowerSum,
COUNT(*) as COUNT,
(COUNT*(PowerSum)-(AVGTEMPSUM))/(sqrt(COUNT*(AVGTEMPSQ)-pow(AVGTEMPSUM,2)*
(COUNT*(PROCPISQ)-pow(PROCPISUM,2)))) AS Correlation
FROM(SELECT series_id,FORMAT(AVG(value),2) AS Average_CPI, period
FROM CURRENT
WHERE series_id = 'CUSR0000SEFK'
AND theYear >=(1997)
AND theYear <=(2010)
GROUP BY period) AS ProduceMonAvg,
(SELECT Average_Temp
FROM AVGTEMP_X)
INNER JOIN ProduceMonAvg
ON AVGTEMP_X.period = ProduceMonAvg.period
I get an error saying 我说错了
1146 - Table 'xxx.ProduceMonAvg' doesn't exist
1146-表'xxx.ProduceMonAvg'不存在
1054 - Unknown column 'COUNT' in 'field list'
1054-“字段列表”中的未知列“ COUNT”
In your outer query, you reference ProdcueMonAvg.Average_CPI
etc. In your inner query, you alias it as AS ProduceMonAvg
. 在外部查询中,引用
ProdcueMonAvg.Average_CPI
等。在内部查询中,将其别名为AS ProduceMonAvg
。 note the typo - Prodcue
vs Produce
. 注意错字
Prodcue
与Produce
。 Are you sure your error doesn't say Table xxx.ProdcueMonAvg doesn't exist
? 您确定您的错误没有说
Table xxx.ProdcueMonAvg doesn't exist
吗?
For that matter, there are a couple of other things that seem wrong with your query. 就此而言,您的查询还有其他几处问题。 Your join to the AVGTEMP_X query is using a subquery where one isn't necessary, it's also performing a cross join and THEN an inner join.
您对AVGTEMP_X查询的联接使用的是不需要子查询的子查询,它还在执行交叉联接,然后是内部联接。 I doubt that is what you wanted.
我怀疑那是你想要的。 Try this one out:
试试这个:
SELECT AVGTEMP_X.Average_Temp,
ProduceMonAvg.Average_CPI,
SUM(AVGTEMP_X.Average_Temp) AS AVGTEMPSUM,
SUM(ProduceMonAvg.Average_CPI) AS PROCPISUM,
SUM(AVGTEMP_X.Average_Temp * AVGTEMP_X.Average_Temp) AS AVGTEMPSQ,
SUM(ProduceMonAvg.Average_CPI * ProduceMonAvg.Average_CPI) PROCPISQ,
SUM(AVGTEMP_X.Average_Temp * ProduceMonAvg.Average_CPI) AS PowerSum,
COUNT(*) AS TOTAL,
(COUNT(*) * (SUM(AVGTEMP_X.Average_Temp * ProduceMonAvg.Average_CPI)) - (SUM(AVGTEMP_X.Average_Temp))) / (sqrt(COUNT(*)* (SUM(AVGTEMP_X.Average_Temp * AVGTEMP_X.Average_Temp)) - pow(SUM(AVGTEMP_X.Average_Temp), 2) * (COUNT(*)* (SUM(ProduceMonAvg.Average_CPI * ProduceMonAvg.Average_CPI)) - pow(SUM(ProduceMonAvg.Average_CPI), 2)))) AS Correlation
FROM (
SELECT series_id,
FORMAT(AVG(value), 2) AS Average_CPI,
period
FROM CURRENT
WHERE series_id = 'CUSR0000SEFK'
AND theYear >= (1997)
AND theYear <= (2010)
GROUP BY period
) AS ProduceMonAvg
INNER JOIN AVGTEMP_X ON AVGTEMP_X.period = ProduceMonAvg.period
I've also created some mock tables and data and finally tested the query. 我还创建了一些模拟表和数据,并最终测试了查询。 It returns results.
它返回结果。 You can see it here: http://sqlfiddle.com/#!9/47523/14
您可以在这里看到它: http : //sqlfiddle.com/#!9/47523/14
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