SQL & PL/SQL

I need to have an insert script for Oracle 11g where I insert large texts into a CLOB field

I exported data from a source table using TOAD's export dataset and the insert statements option, so it generates a script of just simple insert into statements with the clob strings in the values clause within single quotes.

While most of the inserts succeed, several fail with the error: string literal too long

How can I insert long texts into clobs?

One workaround I was considering, is maybe breaking up those inserts which are too big, so that it inserts a chunk, and then does an update to append additional chunks? not sure if that would work either

first wanted to get any ideas from the oracle experts here in case there is a much easier, non-manual labor intensive way.