Database table prefix

The underscore after the table prefix isn’t required but is recommended practice to make the database tables easier to read and sort. Refer to Figure 5-1 and you see that the tables are named like this: wp_commentmeta, wp_ comments, and so on. Placing the underscore after the prefix makes for easier reading and a more organized looking database. Reading a database can be confusing enough, so make it easy on yourself and use the underscore if you choose to change the database table prefix.