我是否需要在 Teradata 的派生 table 中说明所有内容

Question

我在写查询时遇到了一些困惑：

是否需要在子查询中声明所有内容以便在最外层查询中使用？
我正在计算每个高中毕业率 (msa_high) 组的平均收入，但 teradata 不断提示“选定的非聚合值必须是相关组的一部分。”

感谢任何帮助，非常感谢！

SELECT CASE 
WHEN subquery.msa_high>=50 AND subquery.msa_high<=60 THEN 'low'
WHEN subquery.msa_high>=60.1 AND subquery.msa_high <=70 THEN 'medium'
WHEN subquery.msa_high>70 THEN 'high'
END AS rate,
SUM(subquery.amt)/COUNT(DISTINCT subquery.saledate) as AvgRevenue
FROM (SELECT s.store, SUM(t.amt)/COUNT(DISTINCT t.saledate), s.msa_high
      FROM trnsact t JOIN store_msa s
      ON t.store=s.store
      WHERE t.stype='P' 
      AND (t.saledate NOT BETWEEN DATE '2005-08-01' AND LAST_DAY(DATE '2005-08-27'))
      HAVING COUNT(DISTINCT t.saledate)>20) as subquery
GROUP BY rate;

准确查询如下，感谢帮助：

SELECT CASE 
WHEN subquery.msa_high>=50 AND subquery.msa_high<=60 THEN 'low'
WHEN subquery.msa_high>=60.1 AND subquery.msa_high <=70 THEN 'medium'
WHEN subquery.msa_high>70 THEN 'high'
END AS rate,
SUM(subquery.amt)/SUM(subquery.saledate) as AvgRevenue
FROM (SELECT s.store, s.msa_high, SUM(t.amt) as amt, COUNT(DISTINCT t.saledate) as saledate
      FROM trnsact t JOIN store_msa s
      ON t.store=s.store
      WHERE t.stype='P' 
      AND (t.saledate NOT BETWEEN DATE '2005-08-01' AND LAST_DAY(DATE '2005-08-27'))
      GROUP BY s.store, s.msa_high
      HAVING COUNT(DISTINCT t.saledate)>20) as subquery
GROUP BY rate;

Answer 1

您必须使用 GROUP BY 子句中的所有 Non-Aggregated 列。

SELECT CASE 
WHEN subquery.msa_high>=50 AND subquery.msa_high<=60 THEN 'low'
WHEN subquery.msa_high>=60.1 AND subquery.msa_high <=70 THEN 'medium'
WHEN subquery.msa_high>70 THEN 'high'
END AS rate,
SUM(subquery.amt)/SUM(subquery.saledate) as AvgRevenue
FROM (SELECT s.store, SUM(t.amt)as amt,COUNT(DISTINCT t.saledate) as saledate, s.msa_high
      FROM trnsact t JOIN store_msa s
      ON t.store=s.store
      WHERE t.stype='P' 
      AND (t.saledate NOT BETWEEN DATE '2005-08-01' AND LAST_DAY(DATE '2005-08-27'))
      GROUP BY s.store, s.msa_high
      HAVING COUNT(DISTINCT t.saledate)>20) as subquery
GROUP BY rate;

我是否需要在 Teradata 的派生 table 中说明所有内容

Do I need to state everything in the derived table in Teradata

sql

teradata