Question

我的数据库位于IBM上，是DB2。我有两个问题希望加入，但是当我这样做时，他们并不是很有效。该报告是租赁利用率。

第一个查询从 CGIHIST （历史）表和 CGIBASE （设备配置文件）表中提取机器信息。
第二个查询会提取 Rental 信息。在此查询中，我在比较两个日期时使用多个条件执行了Case语句。

我使用 DBXTRA 作为我的报告构建工具，当我链接它们时，我希望能够对Case语句求和。不幸的是，它不会让我。

我希望通过股票编号链接第一个查询，然后将第二个查询case语句中的所有值相加。我尝试在sum前放置case，但这不起作用。

有什么想法吗？

第一次查询：

SELECT CBORD AS "STK", CBMSN AS "SN"
FROM PFWF0022.CGIBASE
LEFT JOIN PFWF0022.CGIHIST
ON CBORD = CHORD
WHERE CBGLIA IN('13100','13150') AND CBCAT <> '' AND CBSTA NOT IN('I','T','O','D','S','P')
GROUP BY CBORD, CBMSN 
ORDER BY cbord
limit 100

第二次质疑：

SELECT RDBR AS "BR", RDCONT AS "CONT", RDSTK AS "STK", RDRDUR AS "DUR", RDPRC AS "PRC",
CASE
WHEN RDDATI = 0 AND DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4)) >= DAYS(CURRENT DATE) THEN '0'
WHEN RDDATI = 0 and DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4)) < DAYS(CURRENT DATE - 90 DAYS) THEN '90'
WHEN RDDATI = '0' AND DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4)) >= DAYS(CURRENT DATE - 90 DAYS) THEN DAYS(CURRENT DATE) - DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4))
WHEN DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4)) < DAYS(CURRENT DATE - 90 DAYS) AND DAYS(substr(RDDATI, 5, 2) || '/' || substr(RDDATI, 7, 2) || '/' || substr(RDDATI, 1, 4)) >= DAYS(CURRENT DATE - 90 DAYS) THEN DAYS(substr(RDDATI, 5, 2) || '/' || substr(RDDATI, 7, 2) || '/' || substr(RDDATI, 1, 4)) - DAYS(CURRENT DATE - 90 DAYS)
WHEN DATE(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4)) < DATE(DAYS(CURRENT DATE - 90 DAYS)) AND DATE(substr(RDDATI, 5, 2) || '/' || substr(RDDATI, 7, 2) || '/' || substr(RDDATI, 1, 4)) < DATE(DAYS(CURRENT DATE - 90 DAYS)) THEN '0'
WHEN DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4)) >= DAYS(CURRENT DATE - 90 DAYS) AND DAYS(substr(RDDATI, 5, 2) || '/' || substr(RDDATI, 7, 2) || '/' || substr(RDDATI, 1, 4)) >= DAYS(CURRENT DATE - 90 DAYS) THEN DAYS(substr(RDDATI, 5, 2) || '/' || substr(RDDATI, 7, 2) || '/' || substr(RDDATI, 1, 4)) - DAYS(substr(RDDATO, 5, 2) || '/' || substr(RDDATO, 7, 2) || '/' || substr(RDDATO, 1, 4))
ELSE 555 END AS "90DAYCNT"
FROM PFWF0022.RMDETL
WHERE RDSTK <> '' 
GROUP BY RDBR, RDCONT, RDSTK, RDRDUR, RDPRC, RDDATI, RDDATO
ORDER BY RDCONT DESC
LIMIT 100

SQL Sum多个Case条件

0 个答案: