Check the consequential digital beaches / coasts/next

Hello.

I have the classic table with the lines:

Range1 - 1-3, 99

Range2 - 4 - 6.99

Range3 - 7-10

Are there any known SQL, built-in Oracle, do anything... to check that they are correlative, adjacent or following one after the other?

In the example above, the validation is true, and if the first value in Range2 was 4.5, validation must be false.

Thank you. Concerning

It looks like you want is to use the analytical function LEAD()

The analytical LAG and LEAD functions you data before lines / following lines in a specific line.

Be sure to read up on all of the analysis of functions in Oracle provide free manual so that you know what is available.

Analytic Functions

He returned to the student to rewrite the SQL code using the analytical function LAG() as an exercise.

It is as an exercise for the student to understand the rest.

with sample_range (range#, range_begin, range_end) as (
  select 1, 1, 3.99 from dual union all
  select 2, 4, 6.99 from dual union all
  select 3, 7, 10.00 from dual union all
  select 4, 10.01, 10.99 from dual union all
  select 5, 10.8, 11.95 from dual
)
select range#, range_begin, range_end
  ,range_end + 0.01 next_range_desired
  ,lead(range_begin,1) over (order by range#) next_range_actual
from sample_range

PS-

A CREATE TABLE and INSERT statements would have been nice.

Re: 2. How can I ask a question in the forums?

Post edited by: MikeKutz
Add more verbiage for explanation of answer

Tags: Database

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