使用mysql查询更改mysql表的格式

我在

mysql

数据库中有下表

我想得到以下格式的结果

---

这是一个典型的表透视问题，请尝试以下操作：

select
    customerName,
    coalesce(max(case when month(`date`) = 1 then paidamount end), '-') as `January` ,
    coalesce(max(case when month(`date`) = 2 then paidamount end), '-') as `February`,
    coalesce(max(case when month(`date`) = 3 then paidamount end), '-') as `March`,
    coalesce(max(case when month(`date`) = 4 then paidamount end), '-') as `April`,
    coalesce(max(case when month(`date`) = 5 then paidamount end), '-') as `May`,
    coalesce(max(case when month(`date`) = 6 then paidamount end), '-') as `June`,
    coalesce(max(case when month(`date`) = 7 then paidamount end), '-') as `July`,
    coalesce(max(case when month(`date`) = 8 then paidamount end), '-') as `August`,
    coalesce(max(case when month(`date`) = 9 then paidamount end), '-') as `September`,
    coalesce(max(case when month(`date`) = 10 then paidamount end), '-') as `October`,
    coalesce(max(case when month(`date`) = 11 then paidamount end), '-') as `November`,
    coalesce(max(case when month(`date`) = 12 then paidamount end), '-') as `December`
from yourtable
group by customerName

---

这是一个典型的表透视问题，请尝试以下操作：

select
    customerName,
    coalesce(max(case when month(`date`) = 1 then paidamount end), '-') as `January` ,
    coalesce(max(case when month(`date`) = 2 then paidamount end), '-') as `February`,
    coalesce(max(case when month(`date`) = 3 then paidamount end), '-') as `March`,
    coalesce(max(case when month(`date`) = 4 then paidamount end), '-') as `April`,
    coalesce(max(case when month(`date`) = 5 then paidamount end), '-') as `May`,
    coalesce(max(case when month(`date`) = 6 then paidamount end), '-') as `June`,
    coalesce(max(case when month(`date`) = 7 then paidamount end), '-') as `July`,
    coalesce(max(case when month(`date`) = 8 then paidamount end), '-') as `August`,
    coalesce(max(case when month(`date`) = 9 then paidamount end), '-') as `September`,
    coalesce(max(case when month(`date`) = 10 then paidamount end), '-') as `October`,
    coalesce(max(case when month(`date`) = 11 then paidamount end), '-') as `November`,
    coalesce(max(case when month(`date`) = 12 then paidamount end), '-') as `December`
from yourtable
group by customerName

---

您可以使用以下查询：

select
    customerName,
    coalesce(sum(case when month(`date`) = 1 then paidamount end), '-') as `January` ,
    coalesce(sum(case when month(`date`) = 2 then paidamount end), '-') as `February`,
    coalesce(sum(case when month(`date`) = 3 then paidamount end), '-') as `March`,
    coalesce(sum(case when month(`date`) = 4 then paidamount end), '-') as `April`,
    coalesce(sum(case when month(`date`) = 5 then paidamount end), '-') as `May`,
    coalesce(sum(case when month(`date`) = 6 then paidamount end), '-') as `June`,
    coalesce(sum(case when month(`date`) = 7 then paidamount end), '-') as `July`,
    coalesce(sum(case when month(`date`) = 8 then paidamount end), '-') as `August`,
    coalesce(sum(case when month(`date`) = 9 then paidamount end), '-') as `September`,
    coalesce(sum(case when month(`date`) = 10 then paidamount end), '-') as `October`,
    coalesce(sum(case when month(`date`) = 11 then paidamount end), '-') as `November`,
    coalesce(sum(case when month(`date`) = 12 then paidamount end), '-') as `December`
from test
group by customerName

---

您可以使用以下查询：

select
    customerName,
    coalesce(sum(case when month(`date`) = 1 then paidamount end), '-') as `January` ,
    coalesce(sum(case when month(`date`) = 2 then paidamount end), '-') as `February`,
    coalesce(sum(case when month(`date`) = 3 then paidamount end), '-') as `March`,
    coalesce(sum(case when month(`date`) = 4 then paidamount end), '-') as `April`,
    coalesce(sum(case when month(`date`) = 5 then paidamount end), '-') as `May`,
    coalesce(sum(case when month(`date`) = 6 then paidamount end), '-') as `June`,
    coalesce(sum(case when month(`date`) = 7 then paidamount end), '-') as `July`,
    coalesce(sum(case when month(`date`) = 8 then paidamount end), '-') as `August`,
    coalesce(sum(case when month(`date`) = 9 then paidamount end), '-') as `September`,
    coalesce(sum(case when month(`date`) = 10 then paidamount end), '-') as `October`,
    coalesce(sum(case when month(`date`) = 11 then paidamount end), '-') as `November`,
    coalesce(sum(case when month(`date`) = 12 then paidamount end), '-') as `December`
from test
group by customerName

---

客户名称是唯一字段吗？没有客户名称不是唯一字段吗？没有客户名称不是唯一字段吗？没有客户名称不是唯一字段没有给出每月支付金额的总和我用sum（）代替max（）现在可以了谢谢没有给出每月支付金额的总和我用sum（）代替max（）现在可以了谢谢