如何将行转换为列

Question

我有一张桌子

GetkingResult

我想这样做

empname LeaveFrom Leave To
Peter   11/05/2015 11/08/2015
peter   09/06/2015  09/08/2015

Answer 1

简单的解决方案，自我加入：

select t1.empname, t1.LeaveFrom, t1.LeaveTo, t2.LeaveFrom, t2.LeaveTo
from tablename t1
  left join tablename t2 on t1.name = t1.name and t1.LeaveFrom < t2.LeaveFrom

（如果某个用户只有1行，请执行LEFT JOIN。）