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How to convert a libreoffice spreadsheet into a database for mail merge documents
Put all your mail merge information into a spreadsheet file (. Ods).
Put headings in the first row to serve as labels for your information. An example of headings would be the words " firstname ", " lastname ", " address ", " state and zip ".
Fill columns with the actual data that will be merged into your document, one contact per row. The contact data should match the first row header.