在Oracle SQL中按日期（即年和月）的一部分进行分组

Question

我想按区域（定义为501,502,503 ...）和年份和月份总结数据值。年份和月份来自数据库中的日期字段。所以实际上我想得到以下内容，但我每天都会得到每个区域的总计：

Area Date  Value 
501 10-2013 100000 
501 11-2013 120000 
502 10-2013 200000 
502 11-2013 222000 
... 

这里是SQL。

SELECT BUSINESS_ENTITY.BUSINESS_ENTITY_NAME, to_char(DATA_POINT_DETAIL.EFF_DATE,'MM-YYYY') as TONNAGE_DATE, sum(DATA_POINT_DETAIL.NUMERIC_VALUE) as ACTUAL 

FROM OIS.BUSINESS_ENTITY BUSINESS_ENTITY INNER JOIN (((OIS.DATA_POINT_DETAIL DATA_POINT_DETAIL INNER JOIN OIS.DATA_POINT_HEADER DATA_POINT_HEADER ON DATA_POINT_DETAIL.DATA_POINT_ID=DATA_POINT_HEADER.DATA_POINT_ID) INNER JOIN OIS.CN_DATA_POINT_BUSINESS_ENTITY CN_DATA_POINT_BUSINESS_ENTITY ON DATA_POINT_HEADER.DATA_POINT_ID=CN_DATA_POINT_BUSINESS_ENTITY.DATA_POINT_ID) INNER JOIN OIS.BUSINESS_ENTITY_ANCESTOR BUSINESS_ENTITY_ANCESTOR ON (CN_DATA_POINT_BUSINESS_ENTITY.BUSINESS_ENTITY_ID=BUSINESS_ENTITY_ANCESTOR.BUSINESS_ENTITY_ID) AND (CN_DATA_POINT_BUSINESS_ENTITY.HIERARCHY_ID=BUSINESS_ENTITY_ANCESTOR.HIERARCHY_ID)) ON BUSINESS_ENTITY.BUSINESS_ENTITY_ID=BUSINESS_ENTITY_ANCESTOR.BUSINESS_ENTITY_ID 

WHERE DATA_POINT_DETAIL.EFF_DATE>={?BeginDate} and DATA_POINT_DETAIL.EFF_DATE<={?EndDate} 
AND BUSINESS_ENTITY_ANCESTOR.BUSINESS_ENTITY_ANCESTOR_ID = 57570 
AND (DATA_POINT_HEADER.DATA_CATEGORY_NAME ='Tons Cut') and DATA_POINT_DETAIL.NUMERIC_VALUE<>0 and BUSINESS_ENTITY.BUSINESS_ENTITY_NAME<>'Ore' 

group by BUSINESS_ENTITY.BUSINESS_ENTITY_NAME, DATA_POINT_DETAIL.EFF_DATE 

我不能按字段为字段TONNAGE_DATE设置一个组。我尝试了很多不同的变体，但都失败了。

这是从Crystal Report的ORACLE数据库上运行的。

任何帮助表示赞赏，

德怀特

Answer 1

你必须按to_char(DATA_POINT_DETAIL.EFF_DATE,'MM-YYYY')，不只是DATA_POINT_DETAIL.EFF_DATE，试试这个：

SELECT BUSINESS_ENTITY.BUSINESS_ENTITY_NAME, to_char(DATA_POINT_DETAIL.EFF_DATE,'MM-YYYY') as TONNAGE_DATE, sum(DATA_POINT_DETAIL.NUMERIC_VALUE) as ACTUAL 

FROM OIS.BUSINESS_ENTITY BUSINESS_ENTITY INNER JOIN (((OIS.DATA_POINT_DETAIL DATA_POINT_DETAIL INNER JOIN OIS.DATA_POINT_HEADER DATA_POINT_HEADER ON DATA_POINT_DETAIL.DATA_POINT_ID=DATA_POINT_HEADER.DATA_POINT_ID) INNER JOIN OIS.CN_DATA_POINT_BUSINESS_ENTITY CN_DATA_POINT_BUSINESS_ENTITY ON DATA_POINT_HEADER.DATA_POINT_ID=CN_DATA_POINT_BUSINESS_ENTITY.DATA_POINT_ID) INNER JOIN OIS.BUSINESS_ENTITY_ANCESTOR BUSINESS_ENTITY_ANCESTOR ON (CN_DATA_POINT_BUSINESS_ENTITY.BUSINESS_ENTITY_ID=BUSINESS_ENTITY_ANCESTOR.BUSINESS_ENTITY_ID) AND (CN_DATA_POINT_BUSINESS_ENTITY.HIERARCHY_ID=BUSINESS_ENTITY_ANCESTOR.HIERARCHY_ID)) ON BUSINESS_ENTITY.BUSINESS_ENTITY_ID=BUSINESS_ENTITY_ANCESTOR.BUSINESS_ENTITY_ID 

WHERE DATA_POINT_DETAIL.EFF_DATE>={?BeginDate} and DATA_POINT_DETAIL.EFF_DATE<={?EndDate} 
AND BUSINESS_ENTITY_ANCESTOR.BUSINESS_ENTITY_ANCESTOR_ID = 57570 
AND (DATA_POINT_HEADER.DATA_CATEGORY_NAME ='Tons Cut') and DATA_POINT_DETAIL.NUMERIC_VALUE<>0 and BUSINESS_ENTITY.BUSINESS_ENTITY_NAME<>'Ore' 

group by BUSINESS_ENTITY.BUSINESS_ENTITY_NAME, to_char(DATA_POINT_DETAIL.EFF_DATE,'MM-YYYY') 

Answer 2

您group by条款改为：

group by BUSINESS_ENTITY.BUSINESS_ENTITY_NAME, 
     to_char(DATA_POINT_DETAIL.EFF_DATE,'MM-YYYY'); 

您的查询按日期分组（日期推测），然后格式化输出以获得月份和年份。