PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

288 Chapter 12 Advanced MySQL Administration
If you do this, you can then view the tables in this database as usual by typing
show tables;
Your results look something like this:
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| servers |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
Each of these tables stores system information. Six of them—user, host, db,
tables_priv, columns_priv, and procs priv—store privilege information.They are
sometimes called grant tables.These tables vary in their specific function but all serve the
same general function, which is to determine what users are and are not allowed to do.
Each of them contains two types of fields: scope fields, which identify the user, host, and
part of a database that the privilege refers to; and privilege fields, which identify which
actions can be performed by that user in that scope.
The user and host tables are used to decide whether a user can connect to the
MySQL server at all and whether she has any administrator privileges.The db and host
tables determine which databases the user can access.The tables_priv table determines
which tables within a database a user can use, the columns_priv table determines which
columns within tables she has access to, and the procs priv table determines which
routines a user can execute.