Composite PK with DATE, how to eliminate the time part of PK?

Hello
I'm looking in the design of a table that have composite PK: REL_DATE (date) + ID_SKU (number).

REL_DATE the value column is real time in it, and I would have that PK is defined only for the part of MY-JJ-AA without time, is it possible? Or should I set up columns for mon-JJ-AA and hh24:mi:ss separately?

I don't know how Oracle trade this situation, can I prune Date in the definition of PK or there another way to do this, my taks overall to have unique PK on REL_DATE(dd-mon-yy) + ID_SKU, without part time so I should have valid data as shown in the insert:
I'm on Ora10g.
...
CONSTRAINT PK_RYBA_01 PRIMARY KEY (REL_DATE, ID_SKU)); 

REL_DATE                ID_SKU     MATRL_IDX...
12-Aug 10 09:14:00      75         TAB12
12-Aug 10 11:14:12      75         INDIGO
12-Aug 10 14:14:57      75         OSB 
TX
Trento

Yes, you can create what is called a function-based index.

CREATE INDEX index_name ON table_name
(TRUNC (REL_DATE), ID_SKU);

Kind regards
Naren

Tags: Database

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