Database Spool Explained: Save Query Outputs

In a database, spool is a function used to save query results to a file. It allows the output of a query to be stored in a file instead of being displayed directly on the screen, making it easy to save for future analysis or processing.

The syntax of the spool command is as follows:

spool <file_path>

After executing this command, the query results will be saved to the specified file path. It is important to remember to turn off the spool function using the “spool off” command after using the “spool” command, otherwise the query results will continue to be outputted to the file.

For example, run the following query and save the results to the output.txt file:

spool output.txt
select * from employees;
spool off

In this example, the query results will be saved to the output.txt file, which can be viewed by opening the file with a text editor.