mssql查询发布日期范围

Question

在mssql 2k12中运行以下查询时，

select PROBSUMMARYM1.AFFECTED_ITEM,
sum(case when SLORESPONSEM1.BREACHED='t' then 1 else 0 end) BREACHED,
sum(case when SLORESPONSEM1.BREACHED='f' then 1 else 0 end) NOBREACHED,
SLORESPONSEM1.SLO_ID 
from PROBSUMMARYM1 
INNER JOIN SLORESPONSEM1 
ON NUMBER=FOREIGN_KEY 
where OPEN_TIME>'2014-11-12'
group by AFFECTED_ITEM,SLO_ID;

我得到了所需的输出，但是，当我将上面第8行中的日期更改为以下任意一项时，我仅获得标头且没有数据，任何人都可以提出可能的问题，db的数据量很大。提到的日期范围，从使用相同mssql实例的应用程序的一些就绪（带盒装）报告中可以肯定并明显地看到

where OPEN_TIME<'2016-05-31'

要么

where OPEN_TIME<'2016-01-01'

要么

where OPEN_TIME between '2016-01-01' AND '2016-06-30'

谢谢和问候Hemant Vaswani

Answer 1

希望这可以帮助，

select PROBSUMMARYM1.AFFECTED_ITEM,
sum(case when SLORESPONSEM1.BREACHED='t' then 1 else 0 end) BREACHED,
sum(case when SLORESPONSEM1.BREACHED='f' then 1 else 0 end) NOBREACHED,
SLORESPONSEM1.SLO_ID 
from PROBSUMMARYM1 
INNER JOIN SLORESPONSEM1 
ON NUMBER=FOREIGN_KEY 
where convert(date,OPEN_TIME) between '2014-11-12' And '2016-06-30'
group by AFFECTED_ITEM,SLO_ID;