create or replace trigger t before update on test5 for each rowbegin insert into test55 values (:old.id,:old.name);end ; -------------------------------------------------------------------------------------- --表中插入数据时ID自动增长 create table ttt (id numbe
使用SqlServer 2015的过程中,会出现如下情况: 在修改完表字段名或是类型后点击保存时会弹出一个对话框,且无法保存已做的修改.对话框内容大致如下: Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can't be
原文:Docker搭建的MySQL容器出现 "Too many connections 1040" 最大连接数修改完未生效的解决方案 版权声明:本文为博主原创文章,未经博主允许不得转载. https://blog.csdn.net/weixin_39835887/article/details/86071545 一.背景 前几天在测试线上环境的过程中,需要一直关注数据库的数据变化.由于线上的MySQL是用Docker搭建的,在本地连接时经常出现 "Too many con