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我试图在oracle apex中创建一个触发器,它将选择我在UniversityRefNo列中的所有数据,并且不允许用户放入已存在的值。但是,我不断收到此错误:"ORA-24344: success with compilation error."
如果有人可以告诉我什么即时做错了,那将是很大的。ORA-24344:编译错误成功。 Trigger apex
CREATE TABLE VOLUNTEER(
Volunteer_id NUMBER(5) PRIMARY KEY,
Title VARCHAR2(5),
VolName VARCHAR2(30),
UniversityRefNo VARCHAR2(10),
Address_Line_1 VARCHAR2(30),
Address_Line_2 VARCHAR2(12),
PostCode VARCHAR2(12),
Mobile_Number NUMBER(12),
Home_Number NUMBER(12),
Email VARCHAR2(25),
Ethnic_Group VARCHAR2(10),
VolunteerType VARCHAR2(10),
Register_Disable VARCHAR2(3),
Gender VARCHAR2(1),
Medical_Details VARCHAR2(20),
PassPortNumber NUMBER(10),
Nationality VARCHAR2(10),
Passport_Expiry_Date DATE,
Date_of_Birth DATE,
Course_Name VARCHAR2(20),
Course_Year VARCHAR2(10),
Area_of_work VARCHAR2(15),
StaffManagerName VARCHAR2(20),
StaffManagerEmail VARCHAR2(20),
StaffManagerPhone VARCHAR2(12));
CREATE or replace trigger unirefnoTrigger
before insert or update of UniversityRefNo ON VOLUNTEER for each row
begin
SELECT UniversityRefNo from VOLUNTEER
if(UniversityRefno = :new.UniversityRefNo) then raise application error(UniversityRefNO || :new.UniversityRefNo || 'already exists');
end if;
end;
我觉得OP的目的是给终端用户比一个更具描述性的错误消息“ORA-00001:唯一约束(constraint_name命令)违反了”,但是请注意,有更好的方法来做到这一点。 – Typo