If your MDT thinks it is possible to cure your bile duct cancer, surgery will be needed to remove any cancerous tissue. Depending on the extent of the cancer, it may be necessary to remove: 1  the part of your bile duct that contains cancerous cells. 2  your gallbladder.
Data extraction. Data extraction is the act or process of retrieving data out of (usually unstructured or poorly structured) data sources for further data processing or data storage (data migration).
The most basic technique for extracting data is to execute a SQL query in SQL*Plus and direct the output of the query to a file. For example, to extract a flat file, empdept.log, containing a list of employee names and department names from the EMP and DEPT tables, the following SQL script could be run: