Check the sequence of events

Hi all.

I need to check the order of a series of events that represents the route of a product. If I receive or deliver the product may occur different events, the problem is that not all events are sequential.

For example:

I f I'm delivering a product, can occur one of the events

1 - load
2 - order for repair
3. - output for repair
4 - the order for rain
5 - output for rain
6 - delivery

The events of the 2 and 3 are sequential as 4 and 5, but 2 is not always before 4. Another variant is that events 2 and 3 could happen but not the 4 and 5, and vice versa.

To complete my task, I only have the following tables:

-If a delivery or reception
CATALOGUE _ROUTE)
NUMBER OF ID_R
TYPE VARCHAR2
);

-All events
() CATALOG_EVENTS
_F IDENTIFICATION NUMBER
TYPE VARCHAR2
);

-Combination of events and itineraries
() ROUTE_EVENTS
NUMBER OF ID_RE
_R IDENTIFICATION NUMBER
NUMBER OF ID_E
Priority NUMBER
);

The priority field is used only in some cases, such events 2 and 3 or 4 and 5.

-Events
Events)
NUMBER OF ID_EV
DATE EVENT_DATE)

The goal is to ensure that all the events have been entered correctly

Hello

Welcome to the forum!

Whenever you have a problem, please post a small example of data (CREATE TABLE and INSERT statements) and the results desired from these data. You don't have to display a large amount of data. In this case, looks like maybe six channels (some of which are valid, and some of whom illegal combinations of events) would be sufficient.

This sounds like a job for analytical functions. LEAD and LAG are great to compare the values of consecutive lines of the the same set of data. Other analytical functions, such as the COUNTY, FIRST_VALUE and MIN, sometimes combined with a CASE expression, can find further values.
Sorry, I don't understand your business rules, so I can't be more specific now. Maybe I could show you exactly if I had a concrete example, including CREATE TABLE and instructions INSERT for all relevant tables and the results desired from these data.

Tags: Database

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