我的sql销售查询来对销售数据进行排序

Question

我有一张表，这是我的销售报告，如bellow

 sno    order_id    code    value 
1              1    Tax         100
2              1    Total       200
3              1    Pay         300
4              2    Tax         120
5              2    Total       230

但我想报告像贝洛一样

sno  order_id     tax    total     pay
1       1         100    200      300
2       2         120   230      0

任何人都可以帮我编写一个mysql查询来执行此操作

Answer 1

select @s := @s + 1 as sno,
       order_id,
       max(case when code = 'tax' then value end) as tax,
       max(case when code = 'total' then value end) as total,
       max(case when code = 'pay' then value end) as pay
from your_table
cross join (select @s := 0) num
group by order_id