oracle触发器中增删改查本表 (1)只有before insert触发器中才可以查询或更新本表 create or replace trigger tri_test_ins before insert on test for each row declare v_cnt integer; begin select count(*) into v_cnt from test; dbms_output.put_line('test count:'||to_char(v_cnt)); u…
1.创建序列 代码 -- Create sequence create sequence seq_userinfo minvalue 1 start with 1 increment by 1; 2.创建触发器 代码 create or replace trigger tigger_userinfo before insert on userinfo for each row declare begin select SEQ_userinfo.nextval into:New.id from d…
SQL Server 1创建触发器 GO BEGIN IF (object_id('WMY', 'tr') is not null) DROP trigger WMY END; GO CREATE TRIGGER WMY ON Student Instead of INSERT AS BEGIN INSERT INTO Student (number,name) VALUES (1205,'角色2'); END; --Begin 与end相当于{},是一个语句块,可有可无此处为演示所用 --ON…
实现Oracle Id自增 1.方法一(Oracle Version Oracle 12c版本支持) create table app_student( id integer generated by default as identity not null primary key, createtime DATE not NULL); insert into app_student(createtime) values(sysdate); 2. 方法二 创建序列 创建表 CREATE TABL…
