-> If not exists(select 1 from user_data where d_id=new.id) then -> insert into user_data(d_id,d_name) values(new.id,new.name);-> END IF;-> end;// -> delimiter ;或者简单一点:mysql> delimiter // -> create trigger sitedata_ins2 -> before insert on user -> for...
以下是MariaDB中create trigger的语法:MySQL不支持or replace和if not exists子句。 CREATE [OR REPLACE] TRIGGER [IF NOT EXISTS] trigger_name { BEFORE | AFTER } { INSERT | UPDATE | DELETE } ON tbl_name FOR EACH ROW trigger_body 触发器只能建立在永久表上,不能建立在视图和临时表上。MySQL/MariaD...
for insert,update as if not exists(select 1 from deleted) begin /*deleted表无记录,是新增*/ end if not exists(select 1 from inserted) begin /*inserted表无记录,是删除*/ end else begin /*是更新*/ end go eg: create trigger Add_Del_Update on tab1 for insert,update,delete as if not e...
以下是MariaDB中create trigger的语法:mysql不支持or replace和if not exists子句。 1 2 3 4CREATE[OR REPLACE]TRIGGER[IF NOT EXISTS]trigger_name{BEFORE|AFTER} {INSERT|UPDATE|DELETE}ONtbl_nameFOREACHROWtrigger_body 触发器只能建立在永久表上,不能建立在视图和临时表上。MySQL/MariaDB中的触发器只支持行...
INSERT INTO t_trigger values(1,'zhangsan',current_date); INSERT INTO t_trigger values(2,'lisi',current_date); INSERT INTO t_trigger values(3,'wangwu',current_date); --创建触发器 CREATE definer=u_trigger TRIGGER IF NOT EXISTS trigger_insert BEFORE insert ON t_trigger FOR EACH ROW BEGIN...
drop trigger if exists trigger_test2; -- 创建触发器trigger_test2 delimiter $$ create trigger trigger_test2 after update on user -- 触发时机:当修改user表数据时触发 for each row -- 每一行 begin insert into user_logs values(NULL,now(), '用户修改发生了修改'); ...
The following trigger : BEGIN IF (NEW.IMHQ_solicitado = 'SI') THEN INSERT INTO imhq (ID_CASO,Tipo_de_estudio,Año,Codigo_interno,Iniciales_Px,Sexo,Edad,n_marcadores_solicitados) VALUES (OLD.ID_CASO, OLD.Tipo_de_estudio, OLD.Año, OLD.Codigo_Interno, OLD.Iniciales_Px, OLD.Sexo,...
CREATE[DEFINER=user]TRIGGER[IFNOTEXISTS]trigger_nametrigger_timetrigger_eventONtbl_nameFOREACHROW[trigger_order]trigger_bodytrigger_time: {BEFORE|AFTER}trigger_event: {INSERT|UPDATE|DELETE}trigger_order: {FOLLOWS|PRECEDES}other_trigger_name This statement creates a new trigger. A trigger is a named...
TRIGGER_CATALOG: def TRIGGER_SCHEMA: sys TRIGGER_NAME: sys_config_insert_set_user EVENT_MANIPULATION: INSERT EVENT_OBJECT_CATALOG: def EVENT_OBJECT_SCHEMA: sys EVENT_OBJECT_TABLE: sys_config ACTION_ORDER: 1 ACTION_CONDITION: NULL ACTION_STATEMENT: BEGIN IF @sys.ignore_sys_config_triggers != ...
create event[ifnot exists]事件名[definer=user]可选参数。执⾏事件的⽤⼾,不指定默认就是当前⽤⼾ on schedule 定时时间设置。定义事件执⾏的频率,可以指定具体时间也可以周期性执行[on completion[not]preserve]可选参数。默认是not,表⽰时间过期后会⽴即删除(注意不是不激活);on completion preserv...