如果表中不存在值则获取 0 - oracle

Question

我有一个查询，它按小时返回有关销售的不同信息，问题是如果在某个时间该表上没有注册表，我需要得到 0。

这是查询：

SELECT COUNT(a.DOC_NO) AS "# TICKET",
       SUM(a.TRANSACTION_TOTAL_AMT) AS "$ TICKET",
       SUM(a.sold_qty) AS "# ITEMS",  a.store_code AS "TIENDA",
       to_char(a.CREATED_DATETIME,'yyyy-mm-dd') AS "FECHA",
       to_char(a.CREATED_DATETIME,'HH24') || ':00' AS "HORA"  
FROM document a  
WHERE a.receipt_type in (0,1) 
AND a.status=4 AND a.store_name!='CEDIS' 
AND to_char(a.CREATED_DATETIME,'yyyy-mm-dd') = '2024-06-01' 
AND a.STORE_CODE = 'ESF' 
GROUP BY a.store_code,to_char(a.CREATED_DATETIME,'yyyy-mm-dd'), to_char(a.CREATED_DATETIME,'HH24') 
ORDER BY a.store_code, to_char(a.CREATED_DATETIME,'yyyy-mm-dd'), to_char(a.CREATED_DATETIME,'HH24')

所以我得到这样的信息：

门票	金额	商品	商店	日期	小时
2	1398	2	ESF	2024-06-01	12:00
1	819	2	ESF	2024-06-01	14:00
2	758.6	4	ESF	2024-06-01	15:00
4	1386.6	4	ESF	2024-06-01	16:00

到目前为止，我尝试过：

SELECT CASE WHEN EXISTS(
        SELECT  COUNT(a.DOC_NO) AS "# TICKET",
    SUM(a.TRANSACTION_TOTAL_AMT) AS "$ TICKET",
        SUM(a.sold_qty) AS "# ITEMS", a.store_code AS "TIENDA",
        to_char(a.CREATED_DATETIME,'yyyy-mm-dd') AS "FECHA",
        to_char(a.CREATED_DATETIME,'HH24') || ':00' AS "HORA"
    FROM document a
    WHERE a.receipt_type in (0,1) and a.status=4 
        AND a.store_name!='CEDIS' 
        AND to_char(a.CREATED_DATETIME,'yyyy-mm-dd') = '2024-06-01' 
        AND a.STORE_CODE = 'ESF'
GROUP BY a.store_code,to_char(a.CREATED_DATETIME,'yyyy-mm-dd'), to_char(a.CREATED_DATETIME,'HH24')
ORDER BY a.store_code, to_char(a.CREATED_DATETIME,'yyyy-mm-dd'), to_char(a.CREATED_DATETIME,'HH24')
)
THEN to_char(a.CREATED_DATETIME,'HH24')
ELSE NULL END AS hours
FROM (VALUES('12'),('13'),('14'),('15'),('16')) CON(hours)

但我认为我错过了一些东西，在另一篇文章中找到了这种方式，但我得到的只是“缺少右括号”。

所以，我需要得到的是，如果在 13:00 没有销售，则查询显示 0（或 null）

门票	金额	商品	商店	日期	小时
2	1398	2	ESF	2024-06-01	12:00
0	0	0	ESF	2024-06-01	13:00
1	819	2	ESF	2024-06-01	14:00
2	758.6	4	ESF	2024-06-01	15:00
4	1386.6	4	ESF	2024-06-01	16:00

Answer 1

使用行生成器生成所有小时，然后使用

PARTITION

ed

OUTER JOIN

，然后将

SUM

聚合包装在

COALESCE

中，将

NULL

值更改为

0

:

SELECT COUNT(a.DOC_NO) AS "# TICKET",
       COALESCE(SUM(a.TRANSACTION_TOTAL_AMT), 0) AS "$ TICKET",
       COALESCE(SUM(a.sold_qty), 0) AS "# ITEMS",
       a.store_code AS "TIENDA",
       a.day AS "FECHA",
       h.hour AS "HORA"  
FROM   ( SELECT TO_CHAR(LEVEL - 1, 'FM00') || ':00' AS hour
         FROM   DUAL
         CONNECT BY LEVEL <= 24 ) h
       LEFT OUTER JOIN (
         SELECT store_code,
                doc_no,
                transaction_total_amt,
                sold_qty,
                TO_CHAR(CREATED_DATETIME,'yyyy-mm-dd') AS day,
                TO_CHAR(CREATED_DATETIME,'HH24') || ':00' AS hour
         FROM   document
         WHERE  receipt_type in (0,1) 
         AND    status=4
         AND    store_name!='CEDIS' 
         AND    CREATED_DATETIME >= DATE '2024-06-01' 
         AND    CREATED_DATETIME <  DATE '2024-06-02'
         AND    STORE_CODE = 'ESF' 
       ) a
       PARTITION BY (a.store_code, a.day)
       ON (a.hour = h.hour)
GROUP BY
       a.store_code,
       a.day,
       h.hour 
ORDER BY
       a.store_code,
       a.day,
       h.hour

对于样本数据：

CREATE TABLE document (
  doc_no, transaction_total_amt, sold_qty, created_datetime,
  receipt_type, status, store_name, store_code
) AS
SELECT 1,
       10,
       100,
       DATE '2024-06-01' + INTERVAL '0' HOUR,
       0,
       4,
       'NOT_CEDIS',
       'ESF'
FROM   DUAL;

输出：

# 门票	$ 门票	# 项目	天达	费查	霍拉
1	10	100	ESF	2024-06-01	00:00
0	0	0	ESF	2024-06-01	01:00
0	0	0	ESF	2024-06-01	02:00
0	0	0	ESF	2024-06-01	03:00
0	0	0	ESF	2024-06-01	04:00
0	0	0	ESF	2024-06-01	05:00
0	0	0	ESF	2024-06-01	06:00
0	0	0	ESF	2024-06-01	07:00
0	0	0	ESF	2024-06-01	08:00
0	0	0	ESF	2024-06-01	09:00
0	0	0	ESF	2024-06-01	10:00
0	0	0	ESF	2024-06-01	11:00
0	0	0	ESF	2024-06-01	12:00
0	0	0	ESF	2024-06-01	13:00
0	0	0	ESF	2024-06-01	14:00
0	0	0	ESF	2024-06-01	15:00
0	0	0	ESF	2024-06-01	16:00
0	0	0	ESF	2024-06-01	17:00
0	0	0	ESF	2024-06-01	18:00
0	0	0	ESF	2024-06-01	19:00
0	0	0	ESF	2024-06-01	20:00
0	0	0	ESF	2024-06-01	21:00
0	0	0	ESF	2024-06-01	22:00
0	0	0	ESF	2024-06-01	23:00

小提琴