Lh_visitors & lh_visitors_log?

When I How can I delete the data in the databas lh_visitors their health databases, currently only have 235mb in the database and creates Most of these lh_visitor_log and lh_visitors. Could you help.

Database error: Query execution was interrupted (1317)

Invalid query: SELECT * FROM cscart_lh_visitors_log LIMIT 104240, 40

You can do this easily using phpmyadmin

You can either click the Empty icon (arrow) next to the table you wish to clear or, you can select multiple tables you want to empty and scroll down to the bottom of the page and choose Empty in the drop down box (be careful not to empty the wrong tables)