Bin grouping probllem

Question

I have the following code
WITH a AS ( SELECT ( LEVEL * 100 ) + LEVEL r
FROM DUAL
CONNECT BY LEVEL < 500)
SELECT MIN ( r ) minn
,MAX ( r ) maxn
,MAX ( r ) - MIN ( r ) gdiff
,TO_NUMBER ( SUBSTR ( r, 1, 1 ) ) * POWER ( 10, LENGTH ( TRIM ( TO_CHAR ( r ) ) ) - 1 ) gseg
FROM a
GROUP BY TO_NUMBER ( SUBSTR ( r, 1, 1 ) ) * POWER ( 10, LENGTH ( TRIM ( TO_CHAR ( r ) ) ) - 1 )
ORDER BY gseg;
for the rows I get back I am trying to do the following.
I want to break down strarting frmo the leftmost digit to th riight most digit in each group I want to get common values ranges.
For Example:
if my range looks like
10,19,9,10
I would be able to get just 1 as a result because all 10,11,12,13,14,15,16,17,18,19 start with a 1 and the whole range is covered. this the smallest common number I get.
If I had a row like
20,24,4,20
I would see that this is only 20,21,22,23,24 and so have all five rows because the range is not complete.
if I have a row like
1000,1700,700,1000
I would like rows liek 100,110,120,130,140,150,160,1700.
1700 is 4 digits because it does not have a complete range for 17xx.
All help is appreciated.

Answer 1

Hi,
Hi,
Whenever you have a question, it helps to post:
(1) The version of Oracle (and any other relevant software) you're using
(2) A little sample data (just enough to show what the problem is) from all the relevant tables. In this case, I'm not sure the 3 sets you already mentioned give a very clear picture of what you want. Maybe you should add a few more examples.
(3) The results you want from that data
(4) Your best attempt so far (formatted)
Executable SQL statements (like "CREATE TABLE AS ..." or "INSERT ..." statements) are best for (2).
Formatted tabular output is okay for (3). Type these 6 characters:
&#123;code&#125;
(small letters only, inside curly brackets) before and after sections of formatted text, to preserve spacing.
smklad wrote:
if my range looks like
10,19,9,10
I would be able to get just 1 as a result because all 10,11,12,13,14,15,16,17,18,19 start with a 1 I'm confused. 9 doesn't start with 1.
If I had a row like
20,24,4,20
I would see that this is only 20,21,22,23,24 and so have all five rows because the range is not complete.What part does 4 play in this result? If none, why not?
if I have a row like
1000,1700,700,1000
I would like rows liek 100,110,120,130,140,150,160,1700.
1700 is 4 digits because it does not have a complete range for 17xx.Why are all the numbers in the output smaller than any of the numbers in the input? It seems like most of them were divied by 10. Why 10? Why not 100?
Try to explain a different way.