Oracle查询当前某条数据的前一行数据与后一行数据

如要查询Staffno是6-1102的前一条记录

?

?

select * from staff where staff_no=(select c.p from (select staff_no,lag(staff_no,1,0) over (order by staff_no) as p from staff) c where c.staff_no='6-1102')

结果：

?

STAFF_NO STAFF_NAME SEX

---------- -------------------- --- -

6-1076 梁柄聪 男 ??

?

1 rows selected

如要查询其后一条记录

?

?

select * from staff where staff_no=(select c.n from (select staff_no,lead(staff_no,1,0) over (order by staff_no) as n from staff) c where c.staff_no='6-1102')

?

结果：

?

?

STAFF_NO STAFF_NAME SEX

---------- -------------------- --- -

6-1103 余志伟 男

?

1 rows selected