except your too_many_rows exception should be dup_val_on_index...
Ron Thomas
Hypercom, Inc
[EMAIL PROTECTED]
Each new user of a new system uncovers a new class of bugs. -- Kernighan
[EMAIL PROTECTED]
e.ny.us To: [EMAIL PROTECTED]
Sent by: cc:
[EMAIL PROTECTED] Subject: RE: PL/SQL Question:Eliminate
duplicate rows
.com
09/19/2003 01:54
PM
Please respond to
ORACLE-L
Johann,
how about the following. what this does is, using the inner begin/end
block, catches when an insert would fail because of the PK failure and
ignores the error.
This is very quick and dirty - it will work fine if you are not working with
a huge amount of data.
declare
cursor c1 is
select col1, col2
from some_table;
begin
for c1_rec in c1 loop
begin
insert into new_table(col1, col2)
values (c1_rec.col1, c1_rec.col2);
exception
when too_many_rows then
null;
end;
end loop;
end;
/
If you are talking about lots and lots of data, you could easily query the
table you are inserting into, testing for the existence of the value you are
attempting to insert. If you find it, skip the insert. Like this:
declare
rec_count number;
cursor c1 is
select col1, col2
from some_table;
begin
for c1_rec in c1 loop
begin
select count(*)
into rec_count
from new_table
where col1 = c1_rec.col1; -- this assumes that col1 is the pk!
if rec_count = 0 then
insert into new_table(col1, col2)
values (c1_rec.col1, c1_rec.col2);
end if;
exception
when too_many_rows then
null;
end;
end loop;
end;
/
Good Luck!
Tom Mercadante
Oracle Certified Professional
-----Original Message-----
Sent: Friday, September 19, 2003 3:05 PM
To: Multiple recipients of list ORACLE-L
Looking for an a sample cursor routine to load a PK enabled table to
eliminate
any dupes from the load table.
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