How to convert a blob to a string in Oracle?

In Oracle database, we can use the UTL_RAW.CAST_TO_VARCHAR2 function to convert data of BLOB type into a string. Here is an example:

SELECT UTL_RAW.CAST_TO_VARCHAR2(BLOB_COLUMN) AS STRING_COLUMN
FROM YOUR_TABLE;

In this example, BLOB_COLUMN is the column used to store BLOB type data, and YOUR_TABLE is the table that contains the BLOB_COLUMN column. The UTL_RAW.CAST_TO_VARCHAR2 function converts BLOB type data into a string, and returns the result as STRING_COLUMN.

Please note that using the UTL_RAW.CAST_TO_VARCHAR2 function to convert BLOB data may result in data loss or truncation, so make sure your data can safely be converted to a string before using this method.