How to improve the updating a sql server table with another table in Oracle

Hi there.
I am trying to do the next updating in SSIS
UPDATE S
SET
S.COLUMN_A = OT.COLUMN_A,
S.COLUMN_B = OT.COLUMN_B
FROM
SQLT1 S INNER JOIN ORACLET1 OT ON
S. COLUMN_C = OT.COLUMN_C
This is what I am doing:
I am taking the Oracle data with the ODBC Source like this.
Select column_A, column_B, column_C
from OracleT1
The thing is, the Oracle table has millions of registers and this updating is taking a lot. But I am not sure if it is maybe because of the design of the update query.
I wonder is if there is another way to design this query or improve the performance of this task.
Thanks a lot.

Yes
Use a OLEDB destination instead and save the records to a staging table
Then use a subsequent Execute sql task and do the set based update in it as below
UPDATE t
SET COLUMN_A = s.COLUMN_A,
COLUMN_B = s.COLUMN_B
FROM SQLT1 t
INNER JOIN stagingTable s
ON s.COLUMN_C = t.COLUMN_C
This would be much faster as its set based
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