sql to find a numeric range inside another range?

[dbarchitech]

hi,

i'm building a query to find narrow ranges of zip codes within broader
ranges in a table (for tax purposes). for example:

LOW_ZIP HI_ZIP
23400 23499

need to find
23401 23402
23403 23440
23441 23... you get the picture. :)

so, each row has a low value and a hi value, then i need to run a
subquery to take those values and find narrower ranges. any ideas?

[Mark C. Stock]

"dbarchitech" <no*******@mac.com> wrote in message
news:9d**************************@posting.google.c om...
| hi,
|
| i'm building a query to find narrow ranges of zip codes within broader
| ranges in a table (for tax purposes). for example:
|
| LOW_ZIP HI_ZIP
| 23400 23499
|
| need to find
| 23401 23402
| 23403 23440
| 23441 23... you get the picture. :)
|
| so, each row has a low value and a hi value, then i need to run a
| subquery to take those values and find narrower ranges. any ideas?

yeah, but you got to show us yours first ;-)

;-{ mcs

[dbarchitech]

"Mark C. Stock" <mcstockX@Xenquery .com> wrote in message news:<eP********************@comcast.com>...

"dbarchitech" <no*******@mac.com> wrote in message
news:9d**************************@posting.google.c om...
| hi,
|
| i'm building a query to find narrow ranges of zip codes within broader
| ranges in a table (for tax purposes). for example:
|
| LOW_ZIP HI_ZIP
| 23400 23499
|
| need to find
| 23401 23402
| 23403 23440
| 23441 23... you get the picture. :)
|
| so, each row has a low value and a hi value, then i need to run a
| subquery to take those values and find narrower ranges. any ideas?

yeah, but you got to show us yours first ;-)

;-{ mcs

yeah, well mine doesn't work!!! :-$

select sales_tax_id,
from_postal_code,
to_postal_code
from ar_sales_tax a,
(select from_postal_code as fpc,
to_postal_code as tpc
from ar_sales_tax
where rowid = rowid) b
where from_postal_code between b.fpc and b.tpc
and to_postal_code between b.fpc and b.tpc
and end_date is null

i need to somehow scan the entire table row by row looking for records
that fit within the ranges... i'm thinking i may need to do this using
a cursor.

-cam

[Mark C. Stock]

"dbarchitech" <no*******@mac.com> wrote in message
news:9d**************************@posting.google.c om...
| "Mark C. Stock" <mcstockX@Xenquery .com> wrote in message
news:<eP********************@comcast.com>...
| > "dbarchitech" <no*******@mac.com> wrote in message
| > news:9d**************************@posting.google.c om...
| > | hi,
| > |
| > | i'm building a query to find narrow ranges of zip codes within broader
| > | ranges in a table (for tax purposes). for example:
| > |
| > | LOW_ZIP HI_ZIP
| > | 23400 23499
| > |
| > | need to find
| > | 23401 23402
| > | 23403 23440
| > | 23441 23... you get the picture. :)
| > |
| > | so, each row has a low value and a hi value, then i need to run a
| > | subquery to take those values and find narrower ranges. any ideas?
| >
| > yeah, but you got to show us yours first ;-)
| >
| > ;-{ mcs
|
| yeah, well mine doesn't work!!! :-$
|
| select sales_tax_id,
| from_postal_code,
| to_postal_code
| from ar_sales_tax a,
| (select from_postal_code as fpc,
| to_postal_code as tpc
| from ar_sales_tax
| where rowid = rowid) b
| where from_postal_code between b.fpc and b.tpc
| and to_postal_code between b.fpc and b.tpc
| and end_date is null
|
| i need to somehow scan the entire table row by row looking for records
| that fit within the ranges... i'm thinking i may need to do this using
| a cursor.
|
| -cam

well, know we know that you tried something!

you won't need a cursor, and you won't need to be one either ;-)

i'll take a stab at it, but it would be nice if you could elaborate on
'doesn't work'

regarding your query

select ...
from ar_sales_tax a
,(
select ...
from ar_sales_tax
where rowid = rowid
) b

the rowid=rowid is always true, don't you think?
so there is no added value in that statement
and there is no added value in the in-line view (the in-line subquery you've
aliased as 'b'

so, if that's simplified to
select ...
from ar_sales_tax a
, ar_sales_tax b
where a.from_postal_code between b.from_postal_code and
b.to_postal_code
and a.to_postal_code between b.from_postal_oce and
b.to_postal_code
and a.end_date is null

all that's going to do for you is give you rows in the 'A' pass at your
table where rows are found in the 'B' pass with a range of codes that
overlap each of the codes from the 'A' pass -- but it doesn't tell you
anything about the relationship between the two passes, and doesn't limit
the results to any specific pair of codes

assuming you're looking for ranges narrower than your 23400/23499 sample,
how about narrowing one of the passes by that pair of values? or returning
the range from the A pass and the range from the B pass in your select
clause, so that you've got something to work with?

;-{ mcs