oracle 不要乱用between and
//需求： //查询出用户在没有出差的时候录入的信息 //分析： //子查询：我们可以显查询出那些在出差时录入信息的用户id，和时间 //主查询：我们从用户明细表中检索信息，条件是，用户id和write_date不在子查询查到的id和时间 // //用户明细表 with tmp_a as( select 1 id,to_date('20100405','yyyymmdd') write_date,'tttttt1' text from dual union all select 1,to_date('20100406','yyyymmdd'),'tttttt2' from dual union all select 1,to_date('20100407','yyyymmdd'),'tttttt3' from dual union all select 1,to_date('20100408','yyyymmdd'),'tttttt4' from dual union all select 1,to_date('20100409','yyyymmdd'),'tttttt5' from dual union all select 1,to_date('20100410','yyyymmdd'),'tttttt6' from dual union all select 1,to_date('20100411','yyyymmdd'),'tttttt7' from dual union all select 1,to_date('20100412','yyyymmdd'),'tttttt8' from dual union all select 1,to_date('20100413','yyyymmdd'),'tttttt9' from dual union all select 1,to_date('20100414','yyyymmdd'),'tttttt10' from dual union all select 2,to_date('20100405','yyyymmdd'),'ssssss1' from dual union all select 2,to_date('20100406','yyyymmdd'),'ssssss2' from dual union all select 2,to_date('20100407','yyyymmdd'),'ssssss3' from dual union all select 2,to_date('20100408','yyyymmdd'),'ssssss4' from dual union all select 2,to_date('20100409','yyyymmdd'),'ssssss5' from dual union all select 2,to_date('20100410','yyyymmdd'),'ssssss6' from dual union all select 2,to_date('20100411','yyyymmdd'),'ssssss7' from dual) //出差记录表 ,tmp_b as( select 1 id,to_date('20100407','yyyymmdd') begin_dt,to_date('20100409','yyyymmdd') end_dt from dual union all select 1,to_date('20100411','yyyymmdd'),to_date('20100412','yyyymmdd') from dual union all select 2,to_date('20100408','yyyymmdd'),to_date('20100410','yyyymmdd') from dual) //查询 SQL //需要解决的问题 //1. 同一用户，间隔出差（存在不同的出差启始时间） 不可简单使用 not between //2. 有些用户，可能没有出差记录 不可简单使用 a.id = b.id //通过过滤 (NOT IN) 查询出不存在出差记录的用户明细 select s.id,s.write_date,s.text from tmp_a s where (s.id,s.write_date) not in (//存在出差记录的用户明细 select distinct a.id,a.write_date from tmp_a a inner join tmp_b b on a.id = b.id where a.write_date between b.begin_dt and b.end_dt ) ID WRITE_DATE TEXT ---------- ----------- -------- 1 2010-04-05 tttttt1 1 2010-04-06 tttttt2 1 2010-04-10 tttttt6 1 2010-04-13 tttttt9 1 2010-04-14 tttttt10 2 2010-04-05 ssssss1 2 2010-04-06 ssssss2 2 2010-04-07 ssssss3 2 2010-04-11 ssssss7
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