database()函数用于返回当前数据库的名称。 current_database()函数用于返回当前数据库的名称。 下面将分别介绍这两个函数的使用方法。 使用示例 database()函数 database()函数用于返回当前数据库的名称。 SELECT DATABASE(); 1. 执行以上SQL语句,将返回当前数据库的名称。 curr
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DECLARE CurrentDatabase VARCHAR (100) ; SELECT DATABASE () INTO CurrentDatabase ; IF NOT EXISTS ( SELECT * FROM information_schema. TABLES WHERE table_schema = CurrentDatabase AND table_name ='表名' ) THEN CREATE TABLE 表名 ( Id INT NOT NULL auto_increment, 字段名 字段类型 [NOT NULL]...
Connection id: 255260 Current database: mysql Current user: root@localhost SSL: Not in use Current pager: stdout Using outfile: '' Using delimiter: ; Server version: 5.1.49-log MySQL Community Server (GPL) Protocol version: 10 Connection: Localhost via UNIX socket Server characterset: utf8 Db...
相关参数character_set_client、character_set_connection 、character_set_database 、character_set_results、 character_set_server 、collation_database 和 collation_server 的默认值都发生了改变。 MySQL 8.0之后推出了caching_sha2_password的认证插件,并且作为推荐使用的认证插件,增加了相应的认证插件参数default_...
database(); schema(); 五、获取用户名 user(); current_user(); system_user(); 六、返回字符串的字符集 charset(str); 当前数据库默认字符集为bgk。version()函数返回值为utf8 七、改变字符集的函数 convert(str using 字符集);//将str转换为对应的字符集 ...
InnoDB: See the Restrictions section of the InnoDB manual.InnoDB: You can drop the orphaned table inside InnoDB byInnoDB: creating an InnoDB table with the same name in anotherInnoDB: database and moving the .frm file to the current database.InnoDB: Then MySQL thinks the table exists, and ...
mysql> CREATE DATABASE menagerie; Under Unix, database names are case-sensitive (unlike SQL keywords), so you must always refer to your database as menagerie, not as Menagerie, MENAGERIE, or some other variant. This is also true for table names. (Under Windows, this restriction does not ...
在文件开头加入 create database databasename; use databasename; 仍然提示下面错误; 原来是导入sql文件时需要选中某个database
Users can monitor database activities using pre-defined performance reports for Connections, Statements, InnoDB Buffer Pool, InnoDB File I/O, Tables / Rows, and Query Cache. Metrics are presented in time series graphs for comparing current and historical values....