database stores their data in tables.数据库将数据保存在table中,一个database可以有多张表,就像一个execel spreadsheet可以有多个sheet一样的概念。 6. show tables; mysql>useintrepid_detectives;Databasechanged mysql>show tables; Emptyset(0.00sec) mysql>usemysqlDatabasechanged mysql>show tables;+---+|...
This may show you a lot of results, including a lot of system tables. You can add a WHERE clause for the owner field to filter on the owner. All Database Tables If you want to list all tables in the Oracle database, you can query the dba_tables view. SELECTtable_nameFROMdba_tables...
启动mysql 交互式数据库 shell,并使用您创建的 root ID 连接到 employees 数据库 使用show tables 命令查看 employees 数据库中包含哪些表 使用describe 命令查看 employees 数据库中的 employees 表中包含哪些列 清单5. 显示 MariaDB 表和列信息 [ian@attic-f23 ~]$ mysql -u root -p employees Enter password...
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 SH...
Flush_commands 执行FLUSH命令的次数。 Handler_delete 请求从一张表中删除行的次数。 Handler_read_first 请求读入表中第一行的次数。 Handler_read_key 请求数字基于键读行。 Handler_read_next 请求读入基于一个键的一行的次数。 Handler_read_rnd 请求读入基于一个固定位置的一行的次数。
Show commands by owner.Make a selection from the Owner list to specify the user whose commands you want to display. To view all scripts select -All Users-. Search for a command.Enter a command name or partial name, or enter a code snippet in the Find field and clickGo. To view all ...
show tables;show databases;show partitions;show functions;describe extended table_name dot col_name; DDL(Data Defination Language):数据库定义语言 建表: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATE[EXTERNAL]TABLE[IFNOTEXISTS]table_name[(col_name data_type[COMMENTcol_comment],...)][...
SQL can set permissions on tables, procedures, and views SQL is a Standard - BUT... Although SQL is an ANSI/ISO standard, there are different versions of the SQL language. However, to be compliant with the ANSI standard, they all support at least the major commands (such asSELECT,UPDATE...
(orALTERTABLERECOVERPARTITIONS)--显示数据库/SCHEMAS,表,表属性,视图,分区,函数,索引,列,建表语句SHOWDATABASES/SCHEMAS,TABLES,TBLPROPERTIES,VIEWS,PARTITIONS,FUNCTIONS,INDEX[ES],COLUMNS,CREATETABLE--显示详细信息,数据库/SCHEMA,表,视图,物化视图DESCRIBEDATABASE/SCHEMA,table_name,view_name,materialized_view_...
(5)列出当前数据库的角色。 sjzt=>\du Listofroles Role name|Attributes|Memberof---+---+---sjzt||{}\dt=\d--结果一样都是列出数据库下的表。 (6)列出数据库下是索引。 sjzt=>\di Listofrelations Schema|Name|Type|Owner|Table|Storage--...