help on concat

Hello
I have a table with two column col1, col2, which is of varchar2 (4000 TANK)
I want to create a new col3 CLOB data type column and add col1 and col2 into that.

I use

update of tab1 set col3 = col1 | col2; - > just a sample...

It gives me the error that there is a limit of 4,000 TANK for concat.

Does anyone have a solution?

Help, please.

Thank you
Roy

Hello

Something like this:

SQL> create table tab1 as
  2  select lpad('A', 4000, 'A') col1,
  3         lpad('B', 4000, 'B') col2
  4    from dual;

Table created
SQL> alter table tab1 add (col3 clob);

Table altered
SQL> update tab1 set col3 = to_clob(col1) || to_clob(col2);

1 row updated
SQL> commit;

Commit complete
SQL> select length(col3) from tab1;

LENGTH(COL3)
------------
        8000

Tags: Database

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-----     ----
SAPP1     9320
SAPP1     9332
SAPP1     1208
SAPP3     9320
SAPP3     9332
SAPP3     1208

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