On 27 Apr, 08:28, William Robertson <williamr2...@[EMAIL PROTECTED]
>
wrote:
>
> 1. I'm not sure if you want to reorganise your schema design, move
> data between tables (insert ... select) or restore to a point in time
> (select ... as of timestamp ..., or flashback table/database though I
> don't think XE provides that). Did you delete the original data?
I didn't delete the original data, but it was replaced with an ID
corresponding to the data in the lookup table. So for example the
employees table had a column called 'JOB_ID'. What has happened is
that all the JOB_ID's have been automatically moved to a separate
table with a Unique Key - and the JOB_ID column (in the employees
table) was replaced with a new column 'JOB_ID_ID' which has values
corresponding the the Unique Key on the new lookup table. I did this
by mistake (it is a redundancy because there is already a table called
'jobs' which lists all of the Job_ID's and their definitions).
I haven't learnt how to do restorations or reorganising schema design
or flashbacks. Maybe I am jumping ahead of myself.
>
> 2. I'm not sure this has much to do with foreign keys. It sounds like
> an Application Express question about how to define a button that pops
> up a selection list populated from a query. I'm sure there there's a
> way but I'm afraid I don't know Apex.
I haven't studied Application Express yet so I don't know if that is
what I am looking for. I noticed that oracle will display a button (on
a form) for entering dates. This is the kind of thing I am looking
for.
I'm beginning to realise that I am probably jumping too far ahead of
myself. I think what I really need is a road map of progressive topics
I need to study. Are there any books or tutorials that explain the key
concepts of oracle without going into too much detail?
Michael
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