Check the sequence of events

Hi all.
I have to check the order of a series of events than represents the route of some product. Depending if i'm receiving or delivering the product can occur differents events, the problem is that not all the events are sequential.
For example:
I f i am delivering a product, can occur any of this events
1.- Loaded
2.- Stopped for repair
3.- Released for repair
4.- Stopped for rain
5.- Released for rain
6.- Delivery
The 2 and 3 events are sequential such as 4 and 5, but 2 is not always before 4. Another variant is that the events 2 and 3 could happen but not 4 and 5 or vice versa.
To complete my task I have only the following tables:
-- If a delivery or receiving cargo
CATALOG _ROUTE (
ID_R      NUMBER
TYPE      VARCHAR2
-- All possible events
CATALOG_EVENTS(
ID _E             NUMBER
TYPE      VARCHAR2
-- Combination of events and routes
ROUTE_EVENTS(
ID_RE           NUMBER
ID _R                  NUMBER
ID_E          NUMBER
Precedence     NUMBER
The precedence field is used only for certain cases, such events 2 and 3 or 4 and 5.
-- Events
Events(
ID_EV NUMBER
EVENT_DATE DATE)
The aim is to ensure that all events have been captured correctly

Hi,
Welcome to the forum!
Whenever you have a problem, please post a little sample data (CREATE TABLE and INSERT statements) and the results you want from that data. You don't have to post a lot of data. In this case, it looks like maybe six routes (some of which are valid, and some of which have various illegal combinations of events) would be enough.
This looks like a job for analytic funtions. LEAD and LAG are great for comparing values from consecutive rows of the the same data set. Other analytic functions, such as COUNT, FIRST_VALUE and MIN, sometimes combined with a CASE expression, can find values from farther away.
Sorry, I don't fully 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 INSERT statements for all the relevant tables, and the results you wanted from that data.

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Get "System Center Data Access Service" is running Automatic not manual and verify that SQL server is running and connectivity between SCOM and SQL is up and not slow for any application run on background.
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Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question, please click "Mark As Answer"
Mai Ali | My blog: Technical | Twitter:
Mai Ali

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