I would like to know how much space does my MySQL database use, in order to select a web host. I found the command SHOW TABLE STATUS LIKE \'table_name\' so when
SHOW TABLE STATUS LIKE \'table_name\'
If you use phpMyAdmin, it can tell you this information.
Just go to "Databases" (menu on top) and click "Enable Statistics".
You will see something like this:
This will probably lose some accuracy as the sizes go up, but it should be accurate enough for your purposes.