if NEW.success = 'no' then # NEW为mysql对新插入记录的封装名; 如果不用mysql的触发器,可以在自己的应用程序中加if判断 insert into errlog(err_cmd,err_time) values(NEW.cmd,NEW.sub_time); end if; # mysql中固定用法 end $$ # $$表一行语句终结 delimiter ; # 将sql中的默认分隔符改回; 三...
mysql> SELECT * FROM triggers WHERE trigger_name='trigger_student_count_insert'; 1. 2. 3. 4. 删除触发器 DROP TRIGGER trigger_name; 1. 五、MySQL用户和权限管理 1、元数据数据库:mysql 系统授权表: db, host, user columns_priv, tables_priv, procs_priv, proxies_priv 1. 2. 用户账号: 'U...
showfulltableswheretable_type='VIEW'; 或showfulltablesfrommysql_practicewheretable_type='VIEW'; 或showfulltablesinmysql_practicewheretable_type='VIEW'; 或SELECTtable_name, table_commentFROMinformation_schema.tableswheretable_type='VIEW'andtable_schema='mysql_practice'; 也可以使用like 创建View 语法 C...
SHOW TRIGGERS ステートメント SHOW VARIABLES ステートメント SHOW WARNINGS ステートメント その他の管理ステートメント ユーティリティステートメント MySQL データディクショナリ InnoDB ストレージエンジン 代替ストレージエンジン レプリケーション グループレプリケーシ...
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Here's what I've had success with so far: Using triggers - you can set triggers on the source tables on which you build the view. This minimizes the resource usage as the refresh is only done when needed. Also, data in the materialized view is realtime-ish Using cron jobs with stor...
(MySQL) .NET pdf viewer .pdb files in production environment? 'An operation was attempted on a nonexistent network connection' error 'bootstrap' is not a valid script name. The name must end in '.js'. 'Cannot implicitly convert 'System.TimeSpan' to 'System.DateTime' 'DayOfWeek' is not...
TheVIEW_TABLE_USAGEtable (available as of MySQL 8.0.13) provides access to information about tables and views used in view definitions. You can see information only for views for which you have some privilege, and only for tables for which you have some privilege. ...
"1) The only privilege allowing any access to triggers at all is SUPER." In 5.0, yes. In 5.1, no because there is a TRIGGER privilege. The SUPER privilege _might_ be required in 5.1, as described in http://dev.mysql.com/doc/refman/5.1/en/create-trigger.html but not necessarily.[...
可以看到activityViewModels返回的是createViewModelLazy方法创建的ViewModel实例,createViewModelLazy调用的是ViewModelLazy的实例,ViewModelLazy又是通过ViewModelProvider实例的get方法获取到ViewModel的实例。 图1 图1已经比较完整的把ViewModel实例的创建过程展示出来了。但是有个疑问,为什么不同的Fragment的获取到的是同一个View...