I have written many posts related totriggersin Oracle Forms, I have given examples forForm Level triggers,Data Block Level triggersandItem Level Triggers. And in this tutorial I am just giving the simple tutorial to how to create a trigger in Oracle Form's object navigator. Create Form Lev...
triggersin Oracle Forms, I have given examples forForm Level triggers,Data Block Level triggersandItem Level Triggers. And in this tutorial I am just giving the simple tutorial to how to create a trigger in Oracle Form's object navigator. Create Form Level Trigger 1. Click on the Triggers...
PL 参考(Oracle 模式) 对已存储 PL 单元的 DDL 操作 CREATE TRIGGER 更新时间:2024-05-11 23:00:00 CREATE TRIGGER语句用于创建或替换数据库触发器。 当发生指定条件时,数据库将自动运行触发器。 功能适用性 该内容仅适用于 OceanBase 数据库企业版。OceanBase 数据库社区版仅提供 MySQL 模式。
For example, let's create a trigger as follows: Oracle: -- Sample tables used in the triggerCREATETABLEcities(nameVARCHAR2(30));CREATETABLEcities_audit(nameVARCHAR2(30),createdDATE);CREATEORREPLACETRIGGERcities_tr BEFOREINSERTORUPDATEONcities REFERENCING OLDASOLD NEWASNEWFOREACH ROWBEGININSERTINT...
CREATE OR REPLACE TRIGGER update_dept AFTER UPDATE ON deptment FOR EACH ROW --Rows trigger. BEGIN UPDATE emp SET id=:new.id WHERE id=:old.id; END; / 4.DELETE TRIGGER,for a special row,not allowed to delete,raise a error. CREATE OR REPLACE TRIGGER book_delete ...
Create or replace trigger ai_emp After insert on emp For each row Begin :new.ename:=upper(:new.ename); End ai_emp; 如下说法对旳旳是(选一项) A. 触发器创立成功,该触发器将每次插入旳新记录旳ename列变为大写 B. 触发器创立成功,该触发器将每次insert语句插入旳第一条记录旳ename列变为大写 C....
第二十二章 SQL命令 CREATE TRIGGER(二) SQL触发器代码 如果LANGUAGE SQL(默认),被触发的语句是一个SQL过程块,包括一个SQL过程语句后跟一个分号,或者关键字BEGIN后跟一个或多个SQL过程语句,每个SQL过程语句后跟一个分号,最后以END关键字结束。 被触发的操作是原子的,它要么完全应用,要么根本不应用,并且不能包含COMM...
Create or replace trigger ai_emp After insert on emp For each row Begin :new.ename:=upper(:new.ename); End ai_emp; 以下说法正确的选项是〔选一项〕 A. 触发器创立成功,该触发器将每次插入的新记录的ename列变为大写 B. 触发器创立成功,该触发器将每次insert语句插入的第一条记录的ename列变为大写...
Specify the schema to contain the trigger. If you omitschema, then Oracle Database creates the trigger in your own schema. trigger Specify the name of the trigger to be created. If a trigger produces compilation errors, then it is still created, but it fails on execution. This means it ...
Oracle Database automatically executes a trigger when specified conditions occur. See Also: ALTER TRIGGER and DROP TRIGGER Prerequisites To create a trigger in your own schema on a table in your own schema or on your own schema (SCHEMA), you must have the CREATE TRIGGER system privilege. ...