数据库知识点记录
- WBOYOriginal
- 2016-06-07 15:30:241103browse
A join B 结果是交集 A left join B 结果的条数是A的条数 full out join 并集 具体见： http://cms.csdnimg.cn/article/201409/29/5428ad03c3fd6.jpg mysql常用命令 http://www.chinaz.com/program/2009/0115/62526.shtml mysql -uroot -paaaaaa -h192.168.0
A join B 结果是交集
A left join B 结果的条数是A的条数
full out join 并集
具体见：
http://cms.csdnimg.cn/article/201409/29/5428ad03c3fd6.jpg
mysql常用命令
http://www.chinaz.com/program/2009/0115/62526.shtml
mysql -uroot -paaaaaa -h192.168.0.110
grep命令
http://www.cnblogs.com/ggjucheng/archive/2013/01/13/2856896.html
mysql简单练习题
http://blog.sina.com.cn/s/blog_767d65530101861c.html
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