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On 04/08/2014 02:51 PM, CS_DBA wrote:
Hi All
we have a table like so:
customer (
cust_id integer not null primary key,
cust_group_id integer not null,
group_account_id integer not null,
cust_name varchar not null,
...
)
we want to force the cust_group_id to be unique across all
group_account_id's but not necessarily across the entire table
I assume the best approach would be a check constraint yes? Will
this be excessively poor per performance if the table gets big?
Thoughts?
Thanks in advance
A
unique index on cust_group_id and group_account_id doesn't do it
for you?
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