Hello,

I will try to gave you more details:
If you have no money and use dblink , You could try to use Materialized view (or create snapshot it is the same purpose).
Here an example:
CREATE MATERIALIZED VIEW abcview
PCTFREE 10 PCTUSED 40 MAXTRANS 255
STORAGE (INITIAL 1024K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1)
TABLESPACE TS_DATA_NAME
BUILD IMMEDIATE
USING INDEX TABLESPACE TS_INDEX_NAME
PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 256K NEXT 256K PCTINCREASE 0 MINEXTENTS 1 MAXEXTENTS 2147483645
FREELISTS 1 FREELIST GROUPS 1)
REFRESH force WITH PRIMARY KEY
START WITH trunc(sysdate) + 4/24
NEXT trunc(sysdate+1) + 4/24
AS
SELECT * FROM table1@base_jc;

It is an example.

Jean Christophe Abiven
DBA OCP