2017-07-31(触发器,包,游标练习)
摘要:
CREATE OR REPLACE TRIGGER check_emp 创建触发器 BEFORE update OR insert OR delete ON emp REFERENCING new AS nn old AS oo FOR EACH ROW WHEN (nn.sal > 2000) B 阅读全文
posted @ 2017-08-01 19:27 Java256 阅读(101) 评论(0) 推荐(0) 编辑