Sql 如何在单个查询中组合这两个查询

如何将这两个查询组合成单个查询

1.

选择从金额>0的凭证收到的金额（金额）

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2.

选择从凭证中偿还的金额您可以使用条件聚合

select sum( case when amount > 0 then amount else 0 end ) as received,
       sum( case when amount < 0 then amount else 0 end ) as repaid 
FROM t

您可以使用条件聚合

select sum( case when amount > 0 then amount else 0 end ) as received,
       sum( case when amount < 0 then amount else 0 end ) as repaid 
FROM t

试试这个

select case when amount>0 then sum(amount) end as 'received', 
case when amount<0 then sum(amount) end as 'repaid' from voucher

选择金额大于0时的情况，然后总和（金额）以“已收到”结束，
当数量时，请尝试此操作

select case when amount>0 then sum(amount) end as 'received', 
case when amount<0 then sum(amount) end as 'repaid' from voucher

选择金额大于0时的情况，然后总和（金额）以“已收到”结束，
当amount@JitinSasidharan：不客气。请读：@jitinasidharan:不客气。请阅读：