标签：
1.排序
SELECT a.* FROM table1 a ORDER BY fiedle1,fiedle2 [desc]
eg: SELECT a.* FROM goods_basic a ORDER BY a.IS_SUPPORT_7RETURN, a.ADD_TIME DESC;
2.高级查询运算符
union
SQL学习笔记
原文地址：http://www.cnblogs.com/xubc/p/5521263.html
