将查询返回的结果合并为一个字符串 - sql server

Question

以下查询返回两行。我想合并这两行。这可能吗？此逻辑稍后将成为另一个查询的列之一：

select SUM(case 
        when FreeRentMonth = 'Y'
            then 1
        else 0
        end) as months
from LARBICRMFact
where rlm_spaceID in (
    select RefCRMSpaceID
    from #OneAE_Multiple_CRM_deals fs
    where fs.RefLeaseAssumptionID = '58500-TSPECTENB-LSPECTENB-0210'
    )
group by rlm_spaceID

期望的结果：
6|7（而不是 6 和 7 位于两行）。

注意*：子查询可以返回 1 个或多个值。

Answer 1

您需要知道rlm_spaceID 的值才能将行转换为列。

例如假设值 6 和 7 用于 rlm_spaceID "value1" 和 "value2"。

rlm_spaceID   months
value1        6
value2        7

类似这样的：

select SUM(case 
            when rlm_spaceID = 'value1'
                and FreeRentMonth = 'Y'
                then 1
            else 0
            end) as val1,
    SUM(case 
            when rlm_spaceID = 'value2'
                and FreeRentMonth = 'Y'
                then 1
            else 0
            end) as val2
from LARBICRMFact
where rlm_spaceID in (
        select RefCRMSpaceID
        from #OneAE_Multiple_CRM_deals fs
        where fs.RefLeaseAssumptionID = '58500-TSPECTENB-LSPECTENB-0210'
        );