Automate a process with sqlite3.exe command line tool

Create a separate text file containing all the commands you would normally type into the sqlite3 shell app:

CREATE TABLE log_entry ( );
.separator "\t"
.import /path/to/logfile.log log_entry

Save it as, say, impscript.sql.

Create a batch file which calls the sqlite3 shell with that script:

sqlite3.exe yourdatabase.db < /path/to/impscript.sql

Call the batch file.