mysql show schema mysql show schemas 首先,检查performance_schema是否支持(performance_schema被视为存储引擎。如果该引擎可用,则应该在INFORMATION_SCHEMA.ENGINES表或SHOW ENGINES语句的输出中看到它的SUPPORT值为YES): qogir_env@localhost : performance_schema 02:41:41> SELECT * FROM INFORMATION_SCHEMA.ENGINES W...
显示建表建库语句 mysql> SHOW DATABASES; +---+ | Database | +---+ | information_schema | | mysql | | performance_schema | | pubmmrpg | | student | | sys | +---+ 6 rows in set (0.01 sec) mysql> SHOW CREATE DATABASE MYSQL; +---+---+ | Database | Create Database | +-...
$ mysqlshow -u root -p Enter password: +---+ | Databases | +---+ | db_learn | | flowable_learn | | information_schema | | mysql | | performance_schema | | sys | | wefe_board | | wefe_data_fusion_1 | | wefe_serving | | xxl_job | +---+ $ 当我使用管理员帐号root输入...
MySQL获取数据库元数据相关命令:DESC、SHOW、INFORMATION_SCHEMA、mysqlshow、mysqldump,一、插入的方式插入可以用以下几种方式:1.插入完整的行2.插入行的一部分3.插入多行4.插入某些查询的结果下面的演示案例,假设表含有4个字段:①插入完整的行可以省略字段名:insert
http://dev.mysql.com/doc/refman/5.7/en/show.html 二、information_schema.tables视图说明 1、information_schema.tables视图的结构说明 information_schema.tables视图常用列属性 DESC information_schema.TABLES TABLE_SCHEMA--->所有数据库的库名 TABLE_NAME--->所有表的表名 ENGINE...
INFORMATION_SCHEMA.DOMAIN_CONSTRAINTS INFORMATION_SCHEMA.DOMAINS INFORMATION_SCHEMA.KEY_COLUMN_USAGE INFORMATION_SCHEMA.PARAMETERS INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS INFORMATION_SCHEMA.ROUTINES 返回当前数据库中当前用户能访问的所有函数和存储过程的元数据信息。
INFORMATION_SCHEMA is an information database, so its name is included in the output from SHOW DATABASES. Similarly, SHOW TABLES can be used with INFORMATION_SCHEMA to obtain a list of its tables: mysql> SHOW TABLES FROM INFORMATION_SCHEMA; +---+ | Tables_in_INFORMATION_SCHEMA | +---+...
INFORMATION_SCHEMA is an information database, so its name is included in the output from SHOW DATABASES. Similarly, SHOW TABLES can be used with INFORMATION_SCHEMA to obtain a list of its tables: mysql> SHOW TABLES FROM INFORMATION_SCHEMA; +---+ | Tables_in_INFORMATION_SCHEMA | +---+...
mysql> SHOW DATABASES;+———–+| Database |+———–+| information_schema || 试试看 || mysql || performance_schema || sale || supermarket || sys |+———–+7 rows in set (0.04 sec)以上输入命令和系统显示信息应该已经很熟悉了。需要注意的是，输入命令SHOW DATABASES;后需要输入一...
('tmp_table_size', 'max_heap_table_size'); # 打开表的数量 show global status like 'open%tables%'; # table高速缓存的数量 show variables like 'table_open_cache'; # 查看MySQL服务器的线程信息 show global status like 'Thread%'; # 查看当前运行的sql SELECT * FROM `information_schema`.`...