Question

运行此代码时出现以下错误。请帮帮我。

SELECT store, COUNT(DISTINCT saledate), CountNov, CountDec, SumNov, SumDec, (SumNov/CountNov) AS NovAvgRvn, (SumDec/CountDec) AS DecAvgRvn FROM 
(
SELECT store, saledate, 
CASE WHEN SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN amt END) IS NULL THEN 0 
ELSE SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN amt END)
END AS SumNov, 
CASE WHEN SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN amt END) IS NULL THEN 0 
ELSE SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN amt END)
END AS SumDec, 
CASE WHEN COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN saledate END) IS NULL THEN 0 
ELSE COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN saledate END)
END AS CountNov, 
CASE WHEN COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN saledate END) IS NULL THEN 0 
ELSE COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN saledate END)
END AS CountDec 
FROM trnsact 
WHERE stype = 'p' 
GROUP BY store, saledate  
) AS T1 
WHERE CountDec > 0 AND CountNov > 0 
GROUP BY store 
ORDER BY store;

错误：错误代码 - 3504 错误消息 - [Teradata数据库] [TeraJDBC 15.10.00.05] [错误3504] [SQLState HY000]选定的非聚合值必须是关联组的一部分。

Answer 1

如果你有group by子句，那么你的select语句中不是SUM，AVG等聚合的任何内容都需要包含在你的group by子句中

试试希望它有所帮助：

SELECT store, COUNT(DISTINCT saledate), CountNov, CountDec, SumNov, SumDec, (SumNov/CountNov) AS NovAvgRvn, (SumDec/CountDec) AS DecAvgRvn FROM 
(
    SELECT store, saledate, 
                CASE WHEN 
                        SUM(CASE EXTRACT(MONTH FROM saledate) 
                                WHEN '11' THEN amt END) IS NULL THEN 0 
                            ELSE SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN amt END)
                        END AS SumNov, 
                CASE WHEN SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN amt END) IS NULL THEN 0 
                            ELSE SUM(CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN amt END)
                        END AS SumDec, 
                CASE WHEN COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN saledate END) IS NULL THEN 0 
                            ELSE COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '11' THEN saledate END)
                        END AS CountNov, 
                CASE WHEN COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN saledate END) IS NULL THEN 0 
                            ELSE COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN '12' THEN saledate END)
                        END AS CountDec 
    FROM trnsact 
    WHERE stype = 'p' 
    GROUP BY store, saledate, SumNov, SumDec, CountNov, CountDec
) AS T1 
    WHERE CountDec > 0 AND CountNov > 0 
GROUP BY store, saledate, CountNov, CountDec, SumNov, SumDec, NovAvgRvn, DecAvgRvn
ORDER BY store;

Answer 2

为什么要使用嵌套查询？

SELECT store, COUNT(DISTINCT saledate), 
       SUM(CASE EXTRACT(MONTH FROM saledate) WHEN 11 THEN amt ELSE 0 END) as SumNov, 
       SUM(CASE EXTRACT(MONTH FROM saledate) WHEN 11 THEN amt ELSE 0 END) as SumDec, 
       COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN 11 THEN saledate END) as CountNov, 
       COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN 12 THEN saledate END) as CountDec
FROM trnsact 
WHERE stype = 'p' 
GROUP BY store;

注意：

COUNT()永远不会返回NULL，因此根本不需要CASE。
使用ELSE子句，SUM()也不会返回NULL（必须没有匹配SUM()的行才能返回NULL 1}}，并且组中没有匹配的行，该组将不存在）。
EXTRACT()会返回一个数字，因此请与数字进行比较。

Answer 3

派生表中的COUNT(DISTINCT saledate)未在月份级别进行聚合，因此1将为EXTRACT。您不应该将字符串用于数字数据（CASE(SUM)的结果）。您不需要COUNT，因为COALESCE永远不会返回NULL（您可以使用SELECT store, -- if you only need the dates from Nov & Dec you can simply do -- CountNov + CountDec instead COUNT(DISTINCT saledate), SUM(CASE EXTRACT(MONTH FROM saledate) WHEN 11 THEN amt ELSE 0 END) AS SumNov, SUM(CASE EXTRACT(MONTH FROM saledate) WHEN 12 THEN amt ELSE 0 END) AS SumDec, COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN 11 THEN saledate END) AS CountNov, COUNT(DISTINCT CASE EXTRACT(MONTH FROM saledate) WHEN 12 THEN saledate END) AS CountDec, (SumNov/CountNov) AS NovAvgRvn, (SumDec/CountDec) AS DecAvgRvn FROM trnsact WHERE stype = 'p' -- don't you need a condition to filter for a specific year/month? AND EXTRACT(MONTH FROM saledate) IN (11,12) GROUP BY store ORDER BY store;代替）：

我假设您想要这样的查询：

public class RandomWord extends JFrame{
private JTextField wordField;
private JTextField defField;
private JButton nextButton;
private String words[] = {"Petrichor:",//0
                        "Iterate:",//1
                        "Absquatulate:",//2
                        "Anhuiliform:",//3
                        "Argle-bargle:","Argus-eyed:",//4
                        "Automy:",//5
                        "Benthos:",//6
                        "Bibliopole:",//7
                        "Bilboes:",//8
                        "Bruxism:",//9
                        "Borborygmus:",//10
                        "Calipygian:",//11
                        "Callithumpian:",//12
                        "Cereology:",//13
                        "Chad:",//14
                        "Chiliad:"};//15

private String def[] = {"The smell of earth after rain.",//0
                        "To utter or perform repeatedly.",//1
                        "To leave somewhere abruptly.",//2
                        "Resembling an eel.",//3
                        "Copious but meaningless talk or writing.",//4
                        "Vigilant, refering to Argos a Greek mythological watchman with a hundred eyes.",//5
                        "The casting off of a limb or other part of the body by an animal under threat, such as a lizard.",//6
                        "The flora and faunda on the bottom of a sea or lake.",//7
                        "A person who buys and sells books, especially rare ones",//8
                        "An iron bar with sliding shackles, used to fasten prisoners' ankles.",//9
                        "Involantary and habitual grinding of the teeth.",//10
                        "A rumbling or gurgling noise in the intestines.",//11
                        "Having shapely buttocks.","Like a discordant band or a noisy parade.",//12
                        "The study or investigation of crop circles.",//13
                        "A piece of waste paper produced by punching a hole.",//14
                        "A thousand things or a thousand years."};//15

public RandomWord(){
    super("Cool Words -1.5");
    setLayout(new FlowLayout());

    int idx = new Random().nextInt(words.length);
    final String randomWord = words[idx];
    final String randomDef = def[idx];

    wordField = new JTextField("Petrichor",20);
    add(wordField);
    defField = new JTextField("The smell of earth after rain",20);
    add(defField);
    nextButton = new JButton("Next");
    add(nextButton);

    nextButton.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent arg0) {
            wordField.setText(randomWord);
            defField.setText(randomDef);

        }
    });
}

分组声明错误？

3 个答案: