added readme.md

Author: mauricepreiss

README.md

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+
 # BackupOracleTables
-Backup all tables from an oracle database to .xlsx-files in a local folder
+
+## Description
+
+Backup all tables from an oracle database to .xlsx-files in a local folder. This tool can be usefull if you want to do a local backup from all tables of a database or you just want to have all tables in a local directory.
+
+## Usage
+
+Start program, it will look  like this:
+
+![program-on-start](https://raw.githubusercontent.com/mauricepreiss/mauricepreiss/main/oraclebackup-program-start.png)
+
+- Textbox: Path
+    - The path where all your files will be saved
+- Button: Clear Path:
+    - The little button with the trash bin on it lets you delete the path from textbox and from settings
+- Button: Settings
+    - Here you add your Oracle connection data and the question, if you wanna backup instantly when program starts
+- Button: Select path and set:
+    - Opens folder dialog to let you select a path for you files, after clicking OK the path will be stored in textbox and in settings
+- Button: Save tables
+    - Saves the tables from in settings given database and saves all its tables to your selected path. A splash loading window will show you that it's in progress.
+
+### Settings
+As already sayed above, in the settings window you will manage your Oracle connection data.
+
+![settings](https://raw.githubusercontent.com/mauricepreiss/mauricepreiss/main/oraclebackup-settings.png)
+
+- Textbox: Host
+    - Hostname for your connection
+- Textbox: Port
+    - Port for your connection
+- Textbox: Servicename
+    - Servicename for your connection
+- Textbox: Username
+    - Username for your connection
+- Textbox: Password
+    - Password for your connection
+
+❗NOTE: The password will be stored encrypted in settings, so its not possible to steal without the program itself. ❗
+
+- Button: Check Connection
+    - Before you can set connection, you have to test if all connection data is valid and a connection could be established. When connection with given connection data is successfull, you can click the "Set Connection" button and the connection will be set.
+- Checkbox: Save on program start
+    - If you dont want to press the "Save" button anytime, you can tick this little box. It allows you to backup tables directly on program start.
+
+
+## License
+
+- no copyright
+- free for commertical usage
+
+## Author ✍️
+
+[@mauricepreiss](https://www.github.com/mauricepreiss)