create table te***
(sname char(1),
sdate varchar2(10),
value number
);insert into te*** (sname, sdate, value)
values ('a', '2008-10-1', 100);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-1', 200);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-10', 900);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-11', 900);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-2', 101);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-3', 100);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-5', 200);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-6', 200);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-8', 900);
insert into te*** (sname, sdate, value)
values ('a', '2008-10-9', 900);
insert into te*** (sname, sdate, value)
values ('b', '2008-10-4', 900);
insert into te*** (sname, sdate, value)
values ('b', '2008-10-5', 900);
insert into te*** (sname, sdate, value)
values ('b', '2008-10-6', 900);
insert into te*** (sname, sdate, value)
values ('c', '2008-11-1', 100);
insert into te*** (sname, sdate, value)
values ('d', '2008-12-1', 300);
commit;
select * from te***
sname sdate value
a 2008-10-1 100
a 2008-10-1 200
a 2008-10-2 101
a 2008-10-3 100
a 2008-10-5 200
a 2008-10-6 200
a 2008-10-8 900
a 2008-10-9 900
a 2008-10-10 900
a 2008-10-11 900
b 2008-10-4 900
b 2008-10-5 900
b 2008-10-6 900
c 2008-11-1 100
d 2008-12-1 300
執行下面語句
with temp as
(select t.*,
lead(timec,1,null) over(partition by sname order by sdate) nexttime1,
lead(timec,2,null) over(partition by sname order by sdate) nexttime2,
lead(rn1,1,null) over(partition by sname order by sdate) nextrn1,
lead(rn1,2,null) over(partition by sname order by sdate) nextrn2
from
(select sname,sdate,value,prvdate,rn1,sdate - prvdate timec from
(select sname,sdate,value,
lag(sdate,1,null) over(partition by sname order by sdate) prvdate,
row_number() over(order by rownum) rn1
from (select sname,to_date(sdate,'yyyy-mm-dd') sdate,value from te*** order by sname,sdate)
)) t
)select * from
(select t.*,row_number() over(order by rownum) rn
from (select sname,to_date(sdate,'yyyy-mm-dd') sdate,value from te*** order by sname,sdate) t
) where rn in
(select rn1 from temp where nexttime1 = 1 and nexttime2 = 1
union
select nextrn1 from temp where nexttime1 = 1 and nexttime2 = 1
union
select nextrn2 from temp where nexttime1 = 1 and nexttime2 = 1
)sname sdate value rn
a 2008-10-1 200 2
a 2008-10-2 101 3
a 2008-10-3 100 4
a 2008-10-8 900 7
a 2008-10-9 900 8
a 2008-10-10 900 9
a 2008-10-11 900 10
b 2008-10-4 900 11
b 2008-10-5 900 12
b 2008-10-6 900 13
乙個簡單的乙個sql表遍歷
簡單的乙個sql表遍歷 一般我們寫儲存過程或者其他sql語句的時候都會用到迴圈遍歷資料，最常用的兩種就是 1 游標 2 臨時表 while 下面貼出示例 declare minrelogid int 這裡的 minrelogid 一般都是表中的主鍵 select top 1 minrelogid m...
乙個sql的例子
select dbo.userinfo.username,dbo.userinfo.usertruename,dbo.userinfo.useremail,dbo.userinfo.usermobile,dbo.userinfo.usertelephone,dbo.userinfo.usercar,...
乙個複雜的sql
select f.course node info id as nodeid,c.course node name as nodename,c.course node type as nodelevel,c.course code,case when select course node info ...