我选择这样的: select * from
(select aa.*,rownum as rn
from (select someRows
from (select *
from table a
left outer join mySecTable b)
left outer join otherTable c
我试图抓住每个“主角”的最新事件。我创建了索引,这个查询仍然需要30分钟以上。 SELECT l.id,
l.home_number,
l.mobile_number,
CASE WHEN l.soldprice < 2 THEN 0 ELSE 1 END as sold,
l.lead_date
FROM (
SELECT l.home_
我需要获取用户数。当我在WHERE子句中添加OR条件时,执行查询需要更多时间。如何优化此SQL查询以最小化执行时间? SELECT SM.ModelId,
SM.NameID,
U.UserCount INTO #SM
FROM Mapper AS SM (NOLOCK) CROSS APPLY (
SELECT COUNT(DISTINCT U.UserNumber) AS