如果列中的记录存在null,则需要查询帮助我从列A中排除记录。
让我们说我有两行是A列,名为" test"它们的B列值分别为1和null。下面是一个查询,我在对象ID上工作的是A列,而endversion在我的场景中是B列。
select b.PortID,
max(endversion)as EndVersion,
d.ShortName as RuleName
from xr.ObjectPropertyValue a
join moxyportfolio b on a.objectid=b.portkey
join xr.AssignAllObjectsRule c on a.Objectclassid=c.ObjectClassID -- can replace with xr.assignobjectrule if it's rule is not assigned to all portfolios.
join xr.rulebase d on c.RuleID=d.RuleID
where objectid in (select objectid from xr.objectpropertyvalue where endversion is not null)
group by a.ObjectId, b.portid,d.ShortName
答案 0 :(得分:0)
您可以使用067
-----------------------------------
Louis Tsai home 0809097
:
HAVING
答案 1 :(得分:0)
如果列B不为空,则仅选择列A的值(否则不选择任何其他内容):
SELECT COLA
FROM TABLE
WHERE COLB IS NOT NULL
如果列B不为空,则仅为列A选择值(否则为null):
SELECT CASE WHEN COLB IS NOT NULL THEN COLA ELSE NULL END AS COLA
FROM TABLE