sql : select ID from awhere XX <> 0 and ID not in (select ID from b)
4万多条记录，执行了316秒，无法接受。
优化为：
select a.ID from a where not exists (select b.ID from b where a.ID = b.ID) and a.XX <> 0
只需0.2秒。
本文共 241 字，大约阅读时间需要 1 分钟。
sql : select ID from awhere XX <> 0 and ID not in (select ID from b)
转载于:https://www.cnblogs.com/jhlong/p/5445440.html