How to convert clob to varchar2 in oracle?

@shyann 

To convert a CLOB (Character Large Object) to a VARCHAR2 in Oracle, you can use the DBMS_LOB package in PL/SQL. Here is an example of how you can do this:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17

DECLARE
  v_clob CLOB;
  v_varchar VARCHAR2(4000);
BEGIN
  -- Assign the clob value to v_clob
  SELECT clob_column INTO v_clob FROM your_table WHERE your_condition;

  -- Initialize the VARCHAR2 variable
  v_varchar := '';

  -- Convert the CLOB to VARCHAR2
  DBMS_LOB.read(v_clob, DBMS_LOB.getlength(v_clob), 1, v_varchar);

  -- Print the converted value
  dbms_output.put_line(v_varchar);
END;
/

In this example, you first select the CLOB value from the table into a CLOB variable. Then, you initialize a VARCHAR2 variable and use the DBMS_LOB.read function to read the CLOB and store it in the VARCHAR2 variable. Finally, you can use the VARCHAR2 variable for further processing or display.

Please note that this approach is suitable for smaller CLOB values that can fit into a VARCHAR2 variable. If your CLOB contains a large amount of data that exceeds the limits of a VARCHAR2 variable, you may need to consider other approaches such as storing the data in a temporary table or using CLOB manipulation functions in PL/SQL.