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Error 1046 No database Selected, how to resolve?
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You need to tell MySQL which database to use:
USE database_name;
before you create a table.
In case the database does not exist, you need to create it as:
CREATE DATABASE database_name;
followed by:
USE database_name;
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How do I show a MySQL warning that just happened?
I just ran a simple MySQL CREATE TABLE statement that produced the line
3 Answers
3
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Which ORM should I use for Node.js and MySQL? [closed]
I'm rewriting a project to use Node.js. I'd like to keep using MySQL as the DB (even though I don't mind rewriting the schema).
I'm looking for a simple-to-use, reasonable-performance ORM, which supports caching, many-to-one and many-to-many relations.
From the MySQL ORMs I could find, persistencej...
Simple way to calculate median with MySQL
...the simplest (and hopefully not too slow) way to calculate the median with MySQL? I've used AVG(x) for finding the mean, but I'm having a hard time finding a simple way of calculating the median. For now, I'm returning all the rows to PHP, doing a sort, and then picking the middle row, but surely ...
推动“一带一路”IT产业怎么走 - 资讯 - 清泛网 - 专注C/C++及内核技术
...味着基础设施建设的提速,还有科技和文化的互联互通。如何把握机会借助“一带一路”走出去,如何在IT产业更为发达的地区站稳脚跟并抓住欠发达地区的市场,这成为目前中国IT企业必须解决的问题。“一带一路”倡议对其...
PHP优化杂烩 - 更多技术 - 清泛网 - 专注C/C++及内核技术
PHP优化杂烩讲 PHP 优化的文章往往都是教大家如何编写高效的代码,本文打算从另一个角度来讨论问题,教大家如何配置高效的环境,如此同样能够达到优...讲 PHP 优化的文章往往都是教大家如何编写高效的代码,本文打算从另...
Mac OS X 入门操作常见问题集锦(持续更新) - 更多技术 - 清泛网 - 专注C/...
Mac OS X 入门操作常见问题集锦(持续更新)如何截图:shift + command + 3 截整屏shift + command + 4 截窗口(默认png,并保存到桌面)shift + command + Ctrl + 4 如何截图:
shift + command + 3 截整屏
shift + command + 4 截窗口(默认png,并保存...
在ATL无窗口ActiveX 控件中如何使用定时器? - 其他 - 清泛IT社区,为创新赋能!
MFC中SetTimer设置定时器、OnTimer时间触发回调函数均是CWnd的成员函数,但前提是必须在有窗口的环境下。
对于ATL无窗口的情况,只能使用原始SetTimer Win32 API函数,如下:
回调函数:
VOID CALLBACK TimerProc(
HWND hwnd, ...
Sql server默认的端口是多少?如何开启远程连接? - 爬虫/数据库 - 清泛IT...
默认是1433,可以在配置管理器中查看:
需要开放1433端口,可以参考《Windows、Linux开放指定端口》。
另外,开启远程连接还需要启用TCP/IP,然后重启服务,步骤如下: