mysql如何用最简单的方法实现行转列（把行转成列）

mysql如何用最简单的方法把行转成列，下面web建站小编给大家简单介绍一下如何利用case语句简单实现！

具体代码如下：

select sum(case when wp_name='WEB' then kills end) as 'WEB',
  sum(case when wp_name='HTML5' then kills END) as 'HTML5',
  sum(case when wp_name='CSS3' then kills END) as 'CSS3'
   from tssrz as a
   join kills1 as b
    on a.id = b.id