added: usage information sections

- execute query
- open table
- filter table
- insert row

README.md

@@ -159,6 +159,46 @@ If you already have a connection set up:
 2. select the right connection (press `j` and `h` for navigation)
 3. connect to the DB (press `c`)
 
+### Create table
+
+There is currently no way to create a table from the TUI.
+However you can run the query to create the table as a SQL-Query, 
+inside the <a href="#execute-sql-querys">SQL Editor</a>.
+
+### Execute SQL querys
+
+1. Press `<Ctrl+E>` to open the built-in SQL Editor
+2. Write the SQL query
+3. Press `<Ctrl+R>` to execute the SQL query
+
+> To switch back to the table-tree press `H`
+
+### Open/view a table
+
+1. Expand table-tree by pressing `e`
+2. Select the table you want to view
+3. Press `<Enter>` to open the table
+
+> To switch back to the table-tree press `H`
+> To switch back to the table press `L`
+
+### Filter rows
+
+0. [Open a table](#openview-a-table)
+1. Press `/` to focus the filter input
+2. Write a `WHERE`-clause to filter the table
+3. Press <Enter> to submit your filter
+
+> To remove the filter focuse the filter input (press `/`) and press `<Esc>`.
+
+### Insert row
+
+0. [Open a table](#openview-a-table)
+1. Press `1` to switch the the record tab
+2. Press `o` to insert a new row
+3. Fill out all columns
+4. Press `<Ctrl+S>` to save the changes
+
 <p align="right">(<a href="#readme-top">back to top</a>)</p>
 
 ## Support