-- Create table a 触发器create table T_AC_TEST( ID VARCHAR2( 32) not null prima
1.decode 函数（小版本的case when）select decode(pd.discount_id,null,'','购买'||pd.product_count||'个，'||pd.product_discount_rate||'折优惠') as discount from b2b_product d right join b2b_product_hot ph on
查看表的创建时间等基本信息select * from user_objects o where o.object_type='TABLE' AND o.object_name LIKE '用户名%' &n
view 层：问题：jsp 页面double 值过大，会变成科学计数法第一步：引入标签<%@ taglib prefix= "fmt" uri ="/WEB-INF/tld/fmt.tld" %> 第二步：<fmt:formatNumber value= "${变量名} "&nbs
Copyright © 2005-2024 51CTO.COM 版权所有 京ICP证060544号
