oracle单行常见多行sql

Question

我有以下查询，与其为同一个 BN 创建多个条目（行），不如在同一行中创建具有 FC、FM、MS 值的条目。

select bspt.BN, FC, FM, MS from(select distinct(ozt.BRD_ID),
bp.NAME as BN, 
os.OSS FC, '' FM, '' MS
from PR_BP ozt, PR_BP_BPP bp, BDD b, OS_VIEW os 
where bp.BRD_ID = ozt.BRD_ID AND ozt.BRD_ID = os.OBJECT_ID and 
os.OST = 'PR_BP_BPP' AND (ozt.BID = 10001)
and ozt.BID = b.BID AND ozt.BP_ACTIVE = 'Y'
UNION ALL
select distinct(ozt.BRD_ID),
bp.NAME as BN, 
'' FC, os.OST FM, '' MS
from PR_BP ozt, PR_BP_BPP bp, BRAND b, OS_VIEW os 
where bp.BRD_ID = ozt.BRD_ID AND ozt.BRD_ID = os.OBJECT_ID and 
os.OST = 'PR_BP_BPP' AND (ozt.BID = 10002)
and ozt.BID = b.BID AND ozt.BP_ACTIVE = 'Y'

上面的查询正在为 BNAME 列生成包含多个条目的输出。因此，与其创建单独的条目，不如为公共 BNAME 创建单行。

Answer 1

所有这些都可以通过条件聚合的一个查询来完成。

select bp.NAME as BIZNAME, 
max(case when bbp.BRAND_ID = 10001 then os.OBJECT_STATUS end) FC,
max(case when bbp.BRAND_ID = 10002 then os.OBJECT_STATUS end) FM, 
max(case when bbp.BRAND_ID = 10007 then os.OBJECT_STATUS end) MS 
from PR_BP bbp
JOIN PR_BP_BPP bp ON bp.BP_ID = bbp.BP_ID
JOIN BRAND b ON bbp.BRAND_ID = b.BRAND_ID
JOIN OS_VIEW os ON bbp.BP_ID = os.OBJECT_ID
where os.OBJECT_TYPE = 'PR_BP_BPP' AND bbp.BP_ACTIVE = 'Y'
group by bp.NAME

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