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

Getting More Information About Databases
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to get a list of tables in the database.
The statement
show databases;
displays a list of available databases.You can then use the SHOW TABLES statement to see a
list of tables in one of those databases:
show tables from books;
When you use SHOW TABLES without specifying a database, it defaults to the one in use.
When you know what the tables are, you can get a list of the columns:
show columns from orders from books;
If you leave off the database name, the SHOW COLUMNS statement will default to the database
currently in use.You can also use the table.column notation:
show columns from books.orders;
One other useful variation of the SHOW statement can be used to see what privileges a
user has. For example, if you run
show grants for bookorama;
you get the following output:
+-----------------------------------------------------------------------+
| Grants for bookorama@% |
+-----------------------------------------------------------------------+
| GRANT USAGE ON *.* TO ‘bookorama’@’%’ |
| IDENTIFIED BY PASSWORD ‘*1ECE648641438A28E1910D0D7403C5EE9E8B0A85’ |
| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER |
| ON `books`.* TO ‘bookorama’@’%’ |
+-----------------------------------------------------------------------+
The GRANT statements shown are not necessarily the ones that were executed to give
privileges to a particular user, but rather summary equivalent statements that would
produce the user’s current level of privilege.
Many other variations of the SHOW statement can be used as well. In fact, there are
over 30 variations of the SHOW statement. Some of the more popular variations are shown
in Table 12.7. For a complete list, see the MySQL Manual entry at http://dev.
mysql.com/doc/refman/5.1/en/show.html. In all instances of [like_or_where] in the
examples below, you can attempt to match a pattern using LIKE or an expression using
WHERE.