我每次尝试创建触发器时都会收到编译错误:请在下面找到问题陈述和代码:
问题陈述:创建名为'trigger_credit_bf_update'的触发器,每当credit_card表更新时触发该触发器。在更新credit_card详细信息之前,此触发器将cc_type和action插入到表'credit_card_log_history'中。受影响的日志表credit_card_log_history中的操作名称是'Before_Update_Credit_Card':我的代码链接此问题:
代码:在每行的credit_card上更新之前创建或替换触发器trigger_credit_bf_update; BEGIN插入credit_card_log_history(cc_type,action)值(:old.cc_type,'Before_Update_Credit_Card');结束;
CREATE OR REPLACE TRIGGER trigger_credit_bf_update
BEFORE UPDATE ON credit_card
FOR EACH ROW
BEGIN
INSERT INTO credit_card_log_history (cc_type, action) Values
(:old.cc_type, 'Before_Update_Credit_Card');
END;