仅SQL将查询行的行设为扩展列

好的，我有这张桌子

CID    CAmountDescription    CAmount
A-19        Payment           500.00
A-19        Loan               50.00
A-20        Payment           100.00  
A-20        Loan               20.00

select 
    CID,
    sum(if(CAmountDescription='Payment',CAmount,0)) as Payment,
    sum(if(CAmountDescription='Loan',CAmount,0)) as Loan
from the_table
group by CID

我希望以这样的方式查询数据库，返回的行如下所示

CID    Payment   Loan
A-19    500.00   50.00       
A-20    100.00   20.00        

select 
    CID,
    sum(if(CAmountDescription='Payment',CAmount,0)) as Payment,
    sum(if(CAmountDescription='Loan',CAmount,0)) as Loan
from the_table
group by CID

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我尝试使用某种类型的JOIN子句，因为这是我知道的唯一添加列的方法，但它返回的行比所需的多。如果有人能在这件事上帮助我，我将不胜感激。多谢各位

嗨@sh_kamalh非常感谢你的回答。只要稍作修改，您的SQL语句就可以工作。我很感激，所以我会投票支持你的答案，但我会选择StanislavL的答案，因为它更有效，至少在我看来，因为它不涉及子查询。谢谢。你好，斯坦尼斯拉夫谢谢你。它就像一个符咒。我将此作为答案，因为它不涉及子查询，因此速度更快：）

select 
    CID,
    sum(if(CAmountDescription='Payment',CAmount,0)) as Payment,
    sum(if(CAmountDescription='Loan',CAmount,0)) as Loan
from the_table
group by CID