Oracle 10g query - group by and order by together

Question

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My Table name is books having the attributes:

bookid
title
author
publisher_name
publisher_address
no_of_copies
cost
subject
publishing_date
isbn

My question is:

List the books order by the year of publishing (oldest book first) categorized by subject.

My query is:

SQL

select * from books group by subject having order by publishing_date;

What is wrong here?

I get : ORA-00936: missing expression

Posted 27-Jan-14 5:51am

SubhamSoni123

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Abhinav S · Answer 1 · 2014-01-27T05:53:00

Solution 1

select * from books group by subject having order by publishing_date;

Remove the having.

In addition, you cannot hae * when you are using group by.

Try select subject, publishing_date from books group by subject order by publishing_date;

Posted 27-Jan-14 5:53am

Abhinav S

Updated 27-Jan-14 6:00am

v4

Comments

SubhamSoni123 27-Jan-14 11:58am

I get this: ORA-00979: not a GROUP BY expression

Abhinav S 27-Jan-14 12:00pm

Try now.

SubhamSoni123 27-Jan-14 12:03pm

Same error...

gettgotcha · Answer 2 · 2014-01-27T06:17:00

Solution 2

GROUP BY implies that you want to aggregate multiple rows from the table into a single row for every SUBJECT value. If that is your goal, you need to specify an aggregate function on the columns that you are not grouping by.

Posted 27-Jan-14 6:17am

gettgotcha