Help needed for Query writing

Question

Hi,
I've select query to retrive the data in the following order
Sequnce ID Model Barcode
1 Dell 123
2 Dell 124
3 Dell 125
4 HP 126
5 hp 127
6 hp 128
7 apple 129
8 apple 130
I want the following to be selected round robin for Dell and Hp laptop alone as mentioned below.
Sequnce ID Model Barcode
1 Dell 123
4 HP 126
2 Dell 124
5 hp 127
3 Dell 125
6 hp 128
7 apple 129
8 apple 130
Can you help me to acheive this?
Thanks!

Answer 1

Hi,
user601042 wrote:
Hi,
I've select query to retrive the data in the following order
Sequnce ID Model Barcode
1 Dell 123
2 Dell 124
3 Dell 125
4 HP 126
5 hp 127
6 hp 128
7 apple 129
8 apple 130If that's what you want, then it looks like
ORDER BY  barcodeis all you need.
If you want the results sorted as below, Then you can use the analytic ROW_NUMBER function:
ORDER BY  CASE
                WHEN  UPPER (model) IN  ('DELL', 'HP')
          THEN  ROW_NUMBER () OVER ( PARTITION BY  UPPER (model)
                                             ORDER BY      barcode
       END
,       barcode
I want the following to be selected round robin for Dell and Hp laptop alone as mentioned below.
Sequnce ID Model Barcode
1 Dell 123
4 HP 126
2 Dell 124
5 hp 127
3 Dell 125
6 hp 128
7 apple 129
8 apple 130Either way, I assume that sequnce id is not actually in your table.
Edited by: Frank Kulash on Mar 14, 2013 12:38 PM
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using (e.g., 11.2.0.2.0).
See the forum FAQ {message:id=9360002}