| Copying data [message #9049] |
Wed, 15 October 2003 09:15  |
Nacbou
Messages: 3
Registered: October 2003
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Junior Member |
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I want to transfer a big amount of data from one table to another table (different structure)
Using :
Insert into tbl1(a1,a2,a3)
Select b1,b2,b3 from tbl2
I tried the following insert but it takes me more then 50 mn to execute.
Insert into tbl1(a1,a2,a3)
Select b1,b2,b3 from tbl2
where not exist ....
I also tried to use the concept of unique constraint combined with "DUP_VAL_ON_INDEX" exception.
The script is running successfully but the non-existing data are not transfered
EXCEPTION
WHEN DUP_VAL_ON_INDEX THEN
DBMS_OUTPUT_LINE('Message');
I'm looking for a solution to be executed in less time
which avoid copying duplicates
Thinks to help me.
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