标签:mysql必知必会笔记
Having和Where的区别:先执行Where的条件,再执行Having的条件
group by和order by的区别:group by是分组,order by是排序
select子句的顺序:select...from...where...group by...having...order by...limit...
MySQL必知必会笔记
原文地址:http://12034516.blog.51cto.com/12024516/1951078