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我写MYSQL的文章主要的原因:我发现网上关于MYSQL的文章比较少,而且很多都是参差不齐,几乎找不到可以比较全面的介绍;例如一篇文章介绍如何增删改查,却没有介绍批量新增;于是下次工作中用到的时候又要搜索一下,找到了关于批量新增的文章,但是没有介绍复制表数据的,那么下次工作用到的时候又要搜索....正是这样零散的知识搜索起来让我感觉特别繁琐,于是就打算自己整理一份可以满足一般MYSQL使用的工作资料,既可以总结知识又可以贡献他人。希望可以坚持下去,勿忘初衷。

 

以下开始正文

 

这篇文章主要介绍开始使用mysql的一些注意事项,本来应该是[MYSQL]分类中的第一篇文章,不过实际工作中没有人一开始就教你MYSQL如何使用,所以工作中各种碰壁后再总结出来。

 

1.安装界面程序

 

工欲善其事,必先利其器;所以开始的第一件事就是找到一个好工具。网上普遍认为mysql的入门比较难,因为mysql并没有界面程序。学习mysql的人往往就是要记一堆命令,然后在黑漆漆的cmd界面中输入命令行。这个情景对于绝大多数习惯window的用户来说难以适应。

MYSQL序言_MySQL

为了让大家感受一下,特意在网上找来图片

 

我认为写命令行完全没有必要,有些东西只要知道原理就好,不必深究;人的一生时间有限,要集中时间学习对自己最有价值的知识。

 

关于mysql的界面程序有不少,我比较推荐SQLyog(我公司就是使用这个);界面布局跟MSSQL相当相似,以至于用惯MSSQL的我几乎瞬间就会用,而且部分功能比MSSQL更加方便。

 

2.编写语句的注意事项

 

1.分号;

 

MYSQL中如果要一次执行多条查询语句,那么每个语句后面都要加上;  所以写完sql后都习惯上;吧

 

2.注释--

 

使用--进行单行注释时, 必须在 -- 后加上空格,否则会报错

 

3.流程控制语句 if else ,while

 

mysql查询语句中没有if else,while等流程控制语句; 流程控制语句需要写存储过程

 

4.空格

 

mysql对语句的格式比较严格,如果语句执行报错,但是检查多次扔找不到原因,可以考虑将多余的空格删除

 

目前想到的就是以上4点了, 了解以上几点后应该就可以流畅地在mysql写sql了。

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