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Count Records

I have following table as books101

BOOK_NO BOOK_NAME AUTHOR_NAME COST CATEGORY
1234 C Dennis 450 System
1235 Oracle Loni 550 Database
1236 Sql Loni 250 Database
1237 Pl/Sql Scott 750 Database


Now I want to List all the authors and book name that has more then 1 book written by them.

pls help
Asked by: abhi.mys1111 | Member Since Jun-2012 | Asked on: Jun 15th, 2012

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kannandevan

Answered On : Jun 15th, 2012

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by grouping book and author 

Code
  1. SELECT book_name,author_name,count(*) FROM books
    2. 

  2. GROUP BY book_name,author_name
    3. 

  3. HAVING count(*)>1

  
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kannandevan

Answered On : Jun 15th, 2012

View all answers by kannandevan

select book_name,author_name,count(*) from books
group by book_name,author_name
having count(*)>1

  
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Avinash

Answered On : Jun 24th, 2012

select AUTHOR_NAME,BOOK_NAME from books101
where AUTHOR_NAME in
(select author_name from books101 group by author_name having count(*)>1);

  
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