R: 响应动作: 不满足怎么办? 以下是Oracle 的触发器的语法例子, 在SQL server中 语法略有差别, 但是思路一致. .. 创建触发器的基本语法: create trigger trigger_name before| after[insert | delete|update] [of colname] on tablename for each row| for each statement when [search_condition] [statemen...
FL 500The CREATE TRIGGER (advanced) statement defines an advanced trigger in a schema and builds a trigger package at the current server. Each time that the trigger activates, the trigger package executes one or more times.
创建触发器的语法格式如下: create trigger trigger_name trigger_time trigger_event on table_name for each row trigger_statement 说明: (1)create trigger:创建触发器的关键词。触发器程序是与表有关的数据库对象. (2)table_name:触发程序的相关表。不能将触发程序与temporary表或视图关联起来。 (3)trigger_...
因为Instead of 触发器在约束之前执行﹐所以它可以对约束进行一些预处理。 五:使用T-SQL语句来创建触发器 基本语句如下: 1createtriggertrigger_name2on{table_name|view_name}3{for|After|Insteadof}4[insert, update,delete]5as6sql_statement 六:删除触发器: 基本语句如下: drop trigger trigger_name 七:查看...
-- SQL Server Syntax-- Trigger on an INSERT, UPDATE, or DELETE statement to a table or view (DML Trigger)CREATE[ORALTER]TRIGGER[schema_name. ]trigger_nameON{ table | view } [WITH<dml_trigger_option>[ ,...n ] ] {FOR|AFTER|INSTEADOF} { [INSERT] [ , ] [UPDATE] [ , ] [DELETE...
you can then refer to this correlation name in the triggered-SQL-statement: DELETE FROM HotelAvailability WHERE hotel_id = DELETEDROW.hotel_id The OLD and NEW transition variables map to ajava.sql.ResultSetwith a single row. Note:Only row triggers (seeStatement versus row triggers) can use...
Thetrigger_eventdoes not represent a literal type of SQL statement that activates the trigger so much as it represents a type of table operation. For example, anINSERTtrigger activates not only forINSERTstatements but alsoLOAD DATAstatements because both statements insert rows into a table. ...
15.1.22 CREATE TRIGGER Statement CREATE [DEFINER = user] TRIGGER [IF NOT EXISTS] trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW [trigger_order] trigger_body trigger_time: { BEFORE | AFTER } trigger_event: { INSERT | UPDATE | DELETE } trigger_order: { FOLLOWS | ...
SQL Server Azure SQL 数据库 Azure SQL 托管实例 从当前数据库中删除一个或多个 DML 或 DDL 触发器。 Transact-SQL 语法约定 语法 syntaxsql -- Trigger on an INSERT, UPDATE, or DELETE statement to a table or view (DML Trigger)DROPTRIGGER[IFEXISTS] [schema_name.]trigger_name[ ,...n ] [ ...
Iftrigger_bodyis a PL/SQL block and it contains errors, then theCREATE[ORREPLACE] statement fails. Restriction ontrigger_body Thedeclare_sectioncannot declare variables of the data typeLONGorLONGRAW. instead_of_dml_trigger Creates anINSTEADOFDML trigger (described in"INSTEAD OF DML Triggers")....