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I'm using Oracle 11g (I think)

I'm trying to create a flat file (CSV or TXT) from a result set but am struggling on where to even start. It seems like I have to create a stored proc and use UTL_FILE. After doing some research, I have two questions:

  1. Where does the file get created? According to this question I need to get access to the Oracle user directory, but where is that on a Windows and Linux environment? I have to test on Windows , and the script will eventually be on a Linux environment.

  2. What would be the basic format of a SQL script to create the aforementioned file, and load data into it from a fairly basic SELECT query?

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There's two routes to go through.

Firstly, Server-side. This is where a process on the machine hosting the DB will write the data to its file system using UTL_FILE. A DIRECTORY entry needs to be created in the database by a DBA pointing to a directory on the file system which can be written to by the OS process running the database (generally 'oracle')

Secondly, client-side. This is where a client program (eg SQL*Plus, Java, Python, Excel...) connects to the database, pulls the required data across to the client and writes it to a file on the client's file system.

You can have the client and server on the same machine, or a shared directory/file system that is accessible to both a client and server (one side needs to be able to read/write, the other can just be read).

You need to decide which best fits your situation, including

  • where you want the file to end up
  • whether the task will be invoked manually or through a scheduler/automation
  • how to manage and deploy changes to the script/code that generates the file
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    If you go for the client side, the new JAVA based SQLcl might be an option. It can generate CSV, JSON and other output directly. – jmk Nov 16 '16 at 9:37

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