How to design a database for multi Companies

Question

I like to hear your comments if you have a database that serves multi companies or if you have good knowledge about this subject.
Our data is sensitive and I was thinking on creating a schema for each company but seems that's a lots of work specially when the schema will change.
Do you keep your multi companies data in one schema, if so, what kind of care we need to take to avoid any mishap??
Thanks
Mo

Answer 1

user4018813 wrote:
I'm just getting started attempting to implement Label Security to move our product from a single to a multi-tenant (i.e. customer) architecture. What is the best way to debug Label Security problems? I've tried trace levels 10730 and 10060 using commands like this:
ALTER SESSION SET EVENTS '10730 trace name context forever';
but didn't get a trace file.
I did get a trace file for a 10046 trace. Here's a SQL statement that resulted from that trace:
SELECT "C1","MI_ROWLABEL_3" FROM "MT_DB1"."T3" "T3" WHERE (1=2 )
I didn't specify that 1=2 predicate, so where is that coming from?
Any help would be greatly appreciated.try instead
Event 10730 - Trace Fine Grained Access Predicates
This event traces find grained access (RLS) predicates
    ALTER SESSION SET EVENTS
    '10730 trace name context forever, level 1';