mysql trigger if else

Database trigger details bitsCN. com1 introduction Like the stored procedure, Mysql triggers are embedded into a mysql program. The trigger is a new function of mysql5. Currently, the online Fengchao system, Beidou system, and Columbus system use

1 Introduction Like the stored procedure, Mysql triggers are embedded into a mysql program. The trigger is a new function of mysql5. Currently, the online fengchao system, Beidou system, and Columbus system use the database of mysql5.0.45. Many

A trigger is a special type of stored procedure. The difference between a trigger and a stored procedure: a trigger is triggered by an event and executed automatically. a stored procedure can be called by the name of the stored procedure. A trigger

Introduction to MySQL Trigger 1 The database server is passive in nature. We use an SQL statement to display the requirement, and it will execute an operation. A trigger is to program a passive server as an active server. A trigger is a piece of

Trigger (Trigger): A special thing,Monitor a certain thing operation (Insert/update/delete),and trigger related actions (Insert/update/delete).A trigger (trigger) creates 4 features: A watch location (table), a monitoring event (Insert/update/delete)

Mysql trigger Implements oracle Materialized view sample code bitsCN.com Oracle Database supports materialized views-instead of a virtual table based on the base table, the data of Materialized views is stored on non-easy storage devices based on

--You must have considerable privileges to create a trigger (created TRIGGER), which is sufficient if you are already a root user. This is different from the SQL standard.CREATE Trigger SyntaxCREATE TRIGGER trigger_name trigger_time trigger_eventon

Sendfile (Data directly from the kernal buffer) for small filesAio (Nginx) Full Async (The difference from event-driven IO is that the data arrives at Mem before it is notified, and no notification can be returned directly to the client) support:

The function I want to implement is when I update a table. Query a record from three tables and insert it into another table. Here's how I write the trigger:The first write triggers such as the following:CREATE TRIGGER IstmingxiAfter UPDATE on

After MySQL exports one sql: DELIMITER $$ DROP TRIGGER IF EXISTS ' Updateegopriceondelete ' $$ CREATE TRIGGER ' Updateegopriceondelete ' after the DELETE on ' CustomerInfo ' For each ROW BEGIN DELETE from Egoprice WHERE