Hello All

Fairly new to the ER world and when i peruse the catalog for ER
training it mentions this:

-Database Design Issues

- Correct database design issues that can negatively impact
replication: Serial keys, Cascading deletes, Triggers, Accumulators


What are Accumulators?


Thanks

Hello Tom,

afaikr an example

update account set balance=balance-100
where customer_num = 123

This can be hazardous in ER with update anywhere.

one could translate it into an insert into withdrawal values (123,
-100, .....);

Superboer.



On 16 nov, 15:54, Tom Lehr <tomc... (AT) gmail (DOT) com> wrote: