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

298 Chapter 12 Advanced MySQL Administration
Table 12.7 SHOW Statement Syntax
Variation Description
SHOW DATABASES [like_or_where] Lists available databases.
SHOW [OPEN] TABLES [FROM database] Lists tables from the database currently in use, or from the database called database.
[like_or_where]
SHOW [FULL] COLUMNS FROM table [FROM Lists all the columns in a particular table from the database currently in use, or from the database specified.
database] [like_or_where] You might use SHOW FIELDS instead of SHOW COLUMNS.
SHOW INDEX FROM table [FROM database] Shows details of all the indexes on a particular table from the database currently in use, or from the database called database
if specified.You might use SHOW KEYS instead.
SHOW [GLOBAL | SESSION] STATUS Gives information about a number of system items, such as the number of threads running.The LIKE clause is used to
[like_or_where] match against the names of these items, so, for example,‘Thread%’ matches the items ‘Threads_cached’, ‘Threads_connected’,‘Threads
created’, and ‘Threads running’.
SHOW [GLOBAL|SESSION] VARIABLES Displays the names and values of the MySQL system variables, such as the version number.
[like_or_where]
SHOW [FULL] PROCESSLIST Displays all the running processes in the system—that is, the queries that are currently being executed. Most users will see
their own threads, but if they have the PROCESS privilege, they can see everybody’s processes—including passwords if they
are in queries.The queries are truncated to 100 characters by default. Using the optional keyword FULL displays the full
queries.
SHOW TABLE STATUS [FROM database] Displays information about each of the tables in the database currently being used, or the database called database if it is
[like_or_where] specified, optionally with a wildcard match.This information includes the table type and the time each table was last
updated.
SHOW GRANTS FOR user Shows the GRANT statements required to give the user specified in user his current level of privilege.
SHOW PRIVILEGES Shows the different privileges that the server supports.
SHOW CREATE DATABASE database Shows a CREATE DATABASE statement that would create the specified database.
SHOW CREATE TABLE tablename Shows a CREATE TABLE statement that would create the specified table.
SHOW [STORAGE] ENGINES Shows the storage engines that are available in this installation and which is the default. (We discuss storage engines further
in Chapter 13,“Advanced MySQL Programming.”)
SHOW INNODB STATUS Shows data about the current state of the InnoDB storage engine.
SHOW WARNINGS [LIMIT [offset,] row_count] Shows any errors, warnings, or notices generated by the last statement that was executed.
SHOW ERRORS [LIMIT [offset,] row_count] Shows only the errors generated by the last statement that was executed.