SQL实现根据类型对金额进行归类
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2024-01-16 09:29:58
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数据库:oracle 问题:在一张明细表里有一个字段表示类型,一个表示金额。现需要将几种类型的金额各合计为一种。 如现有如下数据: idtypeamount 1A100 1A20 1B20 1C10 2B150 2D50 3A50 3C10 3D20 ............ 变成 idtypyA_amounttypyB_amounttypyC_amountt
数据库:oracle问题:在一张明细表里有一个字段表示类型,一个表示金额。现需要将几种类型的金额各合计为一种。
如现有如下数据:
id type amount
1 A 100
1 A 20
1 B 20
1 C 10
2 B 150
2 D 50
3 A 50
3 C 10
3 D 20
............
变成
id typyA_amount typyB_amount typyC_amount typyD_amount
1 120 20 10
2 150 50
3 50 10 20
........
我的实现是使用union all构建一个临时表,然后再使用聚合完成。想问一下有没有更好的方法,这样速度应该不会很快的。请大神帮忙!!!!
select temp.id ,sum(temp.typyA_amount) as typyA_amount ,sum(temp.typyB_amount) as typyB_amount ,sum(temp.typyC_amount) as typyC_amount ,sum(temp.typyD_amount) as typyD_amount from (select t.id ,sum(t.A) as typyA_amount --A ,null as typyB_amount --B ,null as typyC_amount --C ,null as typyD_amount --D from table t where t.type ='A' group by t.id union all select t.id ,null as typyA_amount --A ,sum(t.B) as typyB_amount --B ,null as typyC_amount --C ,null as typyD_amount --D from table t where t.type ='B' group by t.id union all select t.id ,null as typyA_amount --A ,null as typyB_amount --B ,sum(t.C) as typyC_amount --C ,null as typyD_amount --D from table t where t.type ='C' group by t.id union all select t.id ,null as typyA_amount --A ,null as typyB_amount --B ,null as typyC_amount --C ,sum(t.D) as typyD_amount --D from table t where t.type ='D' group by t.id) temp