用mysql sort顯示計數為0的行

Question

我想按列Tgl ，然后按Usia列Usia ，我希望我的空行顯示具有0值的行而不是跳過它，我想記錄我所有的行，即使它們為空

可以說：我沒有日期='2017-09-02'的行數據，我想將其顯示為0值，如果跳過它，則代碼為：

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

如下創建一個臨時表，

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

現在將join與您的結果表一起應用。

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);