The data import plugin allows to import arbitary files into existing tables in the database. Currently the following types of files are supported:
Both file formats offer you some selections to choose the sheet (Excel) or the seperator and file encoding (CSV).
To import a file, right click a table and choose "Import file" from the menu.
After that you can map the table's columns to the colums of the import file. At the top of dialog you firstly choose, if the first row contains the column headers. Then you can associate the existing table columns with the import file columns. You also have several "special" options: