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 delimi
MySQL Performance Schema MySQL sys Schema Prerequisites for Using the sys Schema Using the sys Schema sys Schema Progress Reporting sys Schema Object Reference sys Schema Object Index sys Schema Tables and Triggers sys Schema Views The host_summary and x$host_summary Views The host_summ...
VIEW_ROUTINE_USAGEテーブル (MySQL 8.0.13 で使用可能) を使用すると、ビュー定義で使用されるストアドファンクションに関する情報にアクセスできます。 このテーブルは、定義で使用される組込み SQL 関数またはユーザー定義関数 (UDF) に関する情報を示していません。
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...
在包含gtid_mode系统变量的所有MySQL版本中,它都可以设置成on或off。MySQL 5.7.6之后gtid_mode提供了两个新的选项分别为on_permissive和off_permissive。当gtid_mode = on时,无法复制匿名事务,而当gtid_mode = off时,只能复制匿名事务。当gtid_mode = off_permissive时,新事务是匿名的,同时允许复制的事务是GTID或...
MySQL Create View - Learn how to create views in MySQL with this tutorial. Understand the syntax, benefits, and examples of using views to simplify complex queries.
I know that MySQL has triggers from 5.0.2 but does anyone know if this simple Oracle SQL is possible in MySQL? i.e. simple Oracle example using an INSTEAD-OF-trigger: CREATE VIEW VIEW_TEST AS SELECT A.NAME , A.ID_LOC , B.CITY , B.STATE , B.COUNTRY , A.DEPARTMENT ...
(); // Assuming you have a button or some trigger to fetch selected data QObject::connect(button, &QPushButton::clicked, [&]() { QModelIndexList selectedIndexes = tableView->selectionModel()->selectedRows(); for (const QModelIndex &index : selectedIndexes) { QVariant data = tableView->...
UPDATE table_name SET column_name1 = new_value, column_name2 = new_value... WHERE condition(s) Example In the following query, we are trying to modify the NAME and AGE column values in the CUSTOMERS table for WHERE ID = 3:
According to the docs you can't have triggers on views. Which is a shame because I was hoping to do the same thing. http://dev.mysql.com/doc/refman/5.1/en/create-trigger.html Anyone know of a way around this? mark --