How to use show in mysql
MySQL SHOW command is used to display database information, including databases, tables, views, etc. The syntax is: SHOW [options] [object type] [schema name] [object name]. Common options include FULL (show all information), LIKE (match pattern), and WHERE (filter criteria). Usage examples: Show all databases: SHOW DATABASES; Show all tables in the specified schema: SHOW TABLES FROM my_schema; Show column information of the table: SHOW COLUMNS FROM my_table; Show the list of running processes: SHOW PROCESSLIST; Show
Usage of SHOW command in MySQL
SHOW command is used in MySQL to display database information, including database, table, view, Procedures, functions and variables. It helps database administrators and developers understand the status of the database and perform troubleshooting.
Syntax:
<code>SHOW [选项] [对象类型] [模式名] [对象名]</code>
Among them:
- ##Options
: Specify additional behavior of the command. - Object Type
: Specify the type of information to be displayed, such asDATABASES,TABLES,COLUMNSorPROCESSLIST. - Schema name
(optional): Specifies the database schema from which to retrieve information. - Object name
(optional): Specify the name of the object to display information.
Common options:
- FULL
: Displays all available information about the object. - LIKE
: Displays objects whose names match the given pattern. - WHERE
: Use conditions to filter the objects to be displayed. - GLOBAL
: Displays global scope object information, such as variables. - SESSION
: Displays session scope object information, such as variables.
Usage example:
Display all databases:
<code>SHOW DATABASES;</code>
Display all databases in the specified schema Table:
<code>SHOW TABLES FROM my_schema;</code>
Display column information of the table:
<code>SHOW COLUMNS FROM my_table;</code>
Display the list of running processes:
<code>SHOW PROCESSLIST;</code>
Show global variables:
<code>SHOW GLOBAL VARIABLES;</code>
Show session variables:
<code>SHOW SESSION VARIABLES;</code>
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