13.7.5 显示语句

SHOW有许多表单提供有关数据库、表、列或服务器状态信息的信息。本节介绍以下内容:

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SHOW AUTHORS SHOW {BINARY | MASTER} LOGS SHOW BINLOG EVENTS [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count] SHOW {CHARACTER SET | CHARSET} [like_or_where] SHOW COLLATION [like_or_where] SHOW [FULL] COLUMNS FROM tbl_name [FROM db_name] [like_or_where] SHOW CONTRIBUTORS SHOW CREATE DATABASE db_name SHOW CREATE EVENT event_name SHOW CREATE FUNCTION func_name SHOW CREATE PROCEDURE proc_name SHOW CREATE TABLE tbl_name SHOW CREATE TRIGGER trigger_name SHOW CREATE VIEW view_name SHOW DATABASES [like_or_where] SHOW ENGINE engine_name {STATUS | MUTEX} SHOW [STORAGE] ENGINES SHOW ERRORS [LIMIT [offset,] row_count] SHOW EVENTS SHOW FUNCTION CODE func_name SHOW FUNCTION STATUS [like_or_where] SHOW GRANTS FOR user SHOW INDEX FROM tbl_name [FROM db_name] SHOW MASTER STATUS SHOW OPEN TABLES [FROM db_name] [like_or_where] SHOW PLUGINS SHOW PROCEDURE CODE proc_name SHOW PROCEDURE STATUS [like_or_where] SHOW PRIVILEGES SHOW [FULL] PROCESSLIST SHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n] SHOW PROFILES SHOW RELAYLOG EVENTS [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count] SHOW SLAVE HOSTS SHOW SLAVE STATUS SHOW [GLOBAL | SESSION] STATUS [like_or_where] SHOW TABLE STATUS [FROM db_name] [like_or_where] SHOW [FULL] TABLES [FROM db_name] [like_or_where] SHOW TRIGGERS [FROM db_name] [like_or_where] SHOW [GLOBAL | SESSION] VARIABLES [like_or_where] SHOW WARNINGS [LIMIT [offset,] row_count] like_or_where: { LIKE 'pattern' | WHERE expr }

如果给定SHOW 语句的语法包含一部分, 则为可以包含 SQL和 通配符的字符串。该模式对于将语句输出限制为匹配值很有用。 LIKE 'pattern''pattern'%_

一些SHOW语句还接受一个WHERE子句,该子句在指定要显示的行方面提供了更大的灵活性。请参阅 第 21.9 节,“SHOW 语句的扩展”

许多 MySQL API(例如 PHP)使您能够像对待来自;SHOW的结果集一样对待从语句 返回的结果。SELECT有关详细信息,请参阅 第 23 章连接器和 API或您的 API 文档。此外,您可以在 SQL 中处理对 INFORMATION_SCHEMA数据库中的表进行查询的结果,而这是您无法轻松处理SHOW 语句结果的。请参阅第 21 章,INFORMATION_SCHEMA 表