Question

我想按列Tgl排序，然后按列Usia排序，我希望我的空行显示0值的行而不是跳过它，我想记录我的所有行，即使他们无效

让我们说：我没有关于date ='2017-09-02'的行数据我想把它显示为0值而不是跳过它代码：

SELECT CONCAT(DAY(`date`),' ',MONTHNAME(`date`),' ',YEAR(`date`)) AS Tgl,t.Usia, t.jmlCust
FROM(
SELECT '<20' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust, `date` FROM getpoint gp
LEFT JOIN customer cs ON gp.CardID = cs.CardID
WHERE (YEAR(NOW())-YEAR(cs.tanggallahir))<20
AND nominalbelanja <> 0
GROUP BY DAY(gp.date)
UNION
SELECT '20-35' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust, `date` FROM getpoint gp
LEFT JOIN customer cs ON gp.CardID = cs.CardID
WHERE (YEAR(NOW())-YEAR(cs.tanggallahir)) BETWEEN 20 AND 35
AND nominalbelanja <> 0
GROUP BY DAY(gp.date)
UNION
SELECT '36-50' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust, `date` FROM getpoint gp
LEFT JOIN customer cs ON gp.CardID = cs.CardID
WHERE (YEAR(NOW())-YEAR(cs.tanggallahir)) BETWEEN 36 AND 50
AND nominalbelanja <> 0
GROUP BY DAY(gp.date)
UNION 
SELECT 'TOTAL' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust,`date` FROM getpoint gp
LEFT JOIN customer cs ON gp.CardID = cs.CardID
WHERE nominalbelanja <> 0
GROUP BY DAY(gp.date)
ORDER BY `date`
) t

Answer 1

创建一个临时表，如下所示，

create table test1( 
Usia varchar(10)); 
insert into test1 values ('<20'),('20-35'),('36-50'),('TOTAL');

现在将结果应用于结果表。

SELECT CONCAT(DAY(`date`),' ',MONTHNAME(`date`),' ',YEAR(`date`)) AS Tgl,test1.Usia, ifnull(t.jmlCust,0) 
FROM( 
SELECT '<20' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust, `date` FROM getpoint gp 
LEFT JOIN customer cs ON gp.CardID = cs.CardID 
WHERE (YEAR(NOW())-YEAR(cs.tanggallahir))<20 
AND nominalbelanja <> 0 
GROUP BY DAY(gp.date) 
UNION 
SELECT '20-35' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust, `date` FROM getpoint gp 
LEFT JOIN customer cs ON gp.CardID = cs.CardID 
WHERE (YEAR(NOW())-YEAR(cs.tanggallahir)) BETWEEN 20 AND 35 
AND nominalbelanja <> 0 
GROUP BY DAY(gp.date) 
UNION 
SELECT '36-50' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust, `date` FROM     getpoint gp 
LEFT JOIN customer cs ON gp.CardID = cs.CardID 
WHERE (YEAR(NOW())-YEAR(cs.tanggallahir)) BETWEEN 36 AND 50 
AND nominalbelanja <> 0 
GROUP BY DAY(gp.date) 
UNION 
SELECT 'TOTAL' AS Usia ,COALESCE(COUNT(*),0) AS jmlCust,`date` FROM getpoint gp 
LEFT JOIN customer cs ON gp.CardID = cs.CardID 
WHERE nominalbelanja <> 0 
GROUP BY DAY(gp.date) 
ORDER BY `date` 
) t right join test1 on (test1.Usia = t.Usia);

使用mysql排序显示计数为0的行

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