| copy the contents into CLOB datatype [message #72841] |
Fri, 14 November 2003 07:22  |
blazix
Messages: 6
Registered: October 2003
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Junior Member |
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Hello All,
I have two tables A,B with same colnames and datatypes except one column which is varchar in table A and CLOB in table B.
Now my problem is how to copy all the rows from table A to B.
1.Insert the varchar column values into CLOB datatype
2.Insert null in CLOB for later updation.
Please post the suggestion for the 2 possiblities.
Immediate help is highly appreciated.
Thanks
blazix
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| Re: copy the contents into CLOB datatype [message #72872 is a reply to message #72841] |
Thu, 27 November 2003 05:58  |
Frank Naude
Messages: 4587
Registered: April 1998
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Senior Member |
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Hi,
Look at this example:
-- Create sample tables...
create table A(id number, val varchar2(4000));
create table B(id number, val clob);
-- Populate...
insert into A values (1, 'test value');
commit;
-- Copy data from A to B...
insert into B select * from A;
-- Copy data, but leave the CLOB values NULL...
insert into B select id, empty_clob() from A;
-- Look at copied data...
set NULL NULLVAL
col val format a40
select * from B;
Best regards.
Frank
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