oracle - How to get previous and latest date and its details in SQL -

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i have table following data:

create table tempdata(account varchar2(20)not null,bookid number(10),seqno number(20) not null,book_date date, book1 number(10), book2 number(10),book3 number(10))  insert tempdata values('123',101,09,add_months((sysdate),-1),100,120,130);  insert tempdata values('123',101,10,sysdate),70,60,100)  select * tempdata;  account bookid  seqno   book_date               book1   book2   book3  123      101     9      9/22/2015 10:05:28   100      120    130  123      101     10     10/22/2015 10:01:42  70       60     100

i need output following in order create temp table latest book details including previous date , latest date:

account bookid  seqno     previous_date          latest_date           book1    book2   book3  123      101     10    9/22/2015 10:05:28  10/22/2015 10:01:42          70     60      100

here assuming want data unique account , bookid combination.

select t1.account, t1.bookid, t1.seqno,t1.previous_date,  t1.book_date  latest_date , t1.book1, t1.book2, t1.book3  (     select t.* ,row_number() on (partition account,bookid order book_date desc) rno,      lag(to_char(book_date), 1, 0) on (order book_date) previous_date      tempdata t) t1 t1.rno =1

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