Change database file plain text to sqlite

I have a sqlite db and wanted to edit by using a text editor. SO, I dumped the sqlite database file to plain text format and then edited and saved. The command I used in the terminal is,

echo '.dump' | sqlite3 myfile.db > myfiletext.txt

Here, myfile.db is sqlite database file and myfiletext.txt is the dumped text file respectively. Now, after editing, I want to change this plain text file to sqlite database format. I want help regarding that.