日期:2014-05-17 浏览次数:20946 次
CREATE TABLE T190
(
ID NUMBER(4),
F1 VARCHAR2(20)
);
INSERT INTO T190 VALUES(1, 'a');
INSERT INTO T190 VALUES(2, 'b');
INSERT INTO T190 VALUES(3, 'c');
INSERT INTO T190 VALUES(4, 'd');
------解决方案--------------------
估计楼主是想要分析函数的效果
lag() over 和lead() over()
------解决方案--------------------
with t as(
select 1 id, 'a' name from dual
union all
select 2,'b' from dual
union all
select 3,'c' from dual
union all
select 4,'d' from dual
)select id,name from t order by mod(id,4)
ID NAME
---------- ----
4 d
1 a
2 b
3 c
------解决方案--------------------
with t as(
select 1 id, 'a' name from dual
union all
select 2,'b' from dual
union all
select 3,'c' from dual
union all
select 4,'d' from dual
)select id,name from t order by mod(id+2,4)
ID NAME
---------- ----
2 b
3 c
4 d
1 a
------解决方案--------------------
with t as(
select 1 id, 'a' name from dual
union all
select 2,'b' from dual
union all
select 3,'c' from dual
union all
select 4,'d' from dual
)select mod(id+2,4)+1 id,name from t order by id ID NAME
---------- ----
1 b
2 c
3 d
4 a