SQL子查询来自同一个表的所有数据

我有一张表，我希望总是显示一个字段（帐户），然后子查询计数或带标准的总和。SQL子查询来自同一个表的所有数据

例子：

select ndhist_acct_nbr,  
    (select count(ndhist_acct_nbr) from dbo.nd_history where ndhist_type = '30' 
     and ndhist_rsn = '0' and ndhist_trcd = 'NF*' and ndhist_ref_type = '0' and ndhist_dt >= '03/01/2013') as NSF_TOTAL, 
    (select sum(ndhist_amt) from dbo.nd_history where ndhist_type = '30' 
     and ndhist_rsn = '98' and ndhist_trcd = 'TW0' and ndhist_ref_type = '11' and ndhist_dt >= '03/01/2013') as SIG_SPEND, 
    (select count(ndhist_acct_nbr) from dbo.nd_history where ndhist_type = '30' 
     and ndhist_rsn = '23' and ndhist_trcd = 'TW0' and ndhist_ref_type = '11' and ndhist_dt >= '03/01/2013') as PIN_TRANS, 
    (select count(ndhist_acct_nbr) from dbo.nd_history where ndhist_type = '30' 
     and ndhist_rsn = '21' and ndhist_trcd = 'SC*' and ndhist_ref_type = '0' and ndhist_dt >= '03/01/2013') as FOREIGN_AMT_FEE 
from dbo.nd_history 
group by ndhist_acct_nbr

问题是结果 - 所有的帐户号码的出现，但计数/总和字段的所有重复数据。任何帮助都是极好的！

来源

2013-03-21 Tom Murphy

欢迎来到Stack Overflow！请通过添加适当的标记（Oracle，SQL Server，MySQL等）来指定您要定位的RDBMS。可能会有利用不被普遍支持的语言或产品功能的答案。此外，通过为特定的RDBMS添加标签，您的问题可能会得到更适合回答的人的关注。 – Taryn 2013-03-21 12:04:45

尝试：

select ndhist_acct_nbr,  
     count(case when ndhist_type = '30' and ndhist_rsn = '0' and ndhist_trcd = 'NF*' and ndhist_ref_type = '0' and ndhist_dt >= '03/01/2013' 
        then ndhist_acct_nbr end) as NSF_TOTAL, 
     sum(case when ndhist_type = '30' and ndhist_rsn = '98' and ndhist_trcd = 'TW0' and ndhist_ref_type = '11' and ndhist_dt >= '03/01/2013' 
       then ndhist_amt end) as SIG_SPEND, 
     count(case when ndhist_type = '30' and ndhist_rsn = '23' and ndhist_trcd = 'TW0' and ndhist_ref_type = '11' and ndhist_dt >= '03/01/2013' 
        then ndhist_acct_nbr end) as PIN_TRANS, 
     count(case when ndhist_type = '30' and ndhist_rsn = '21' and ndhist_trcd = 'SC*' and ndhist_ref_type = '0' and ndhist_dt >= '03/01/2013' 
        then ndhist_acct_nbr end) as FOREIGN_AMT_FEE 
from dbo.nd_history 
group by ndhist_acct_nbr

您可以通过将整个查询的在线查询内，然后从中选择使用源自结果列 - 像这样：

select sq.*, 
     NSF_TOTAL*5 + SIG_SPEND*0.10 + PIN_TRANS*0.05 + FOREIGN_ATM_FEE as TOTAL_INCOME 
from 
(select ndhist_acct_nbr,  
     count(case when ndhist_type = '30' and ndhist_rsn = '0' and ndhist_trcd = 'NF*' and ndhist_ref_type = '0' and ndhist_dt >= '03/01/2013' 
        then ndhist_acct_nbr end) as NSF_TOTAL, 
     sum(case when ndhist_type = '30' and ndhist_rsn = '98' and ndhist_trcd = 'TW0' and ndhist_ref_type = '11' and ndhist_dt >= '03/01/2013' 
        then ndhist_amt end) as SIG_SPEND, 
     count(case when ndhist_type = '30' and ndhist_rsn = '23' and ndhist_trcd = 'TW0' and ndhist_ref_type = '11' and ndhist_dt >= '03/01/2013' 
        then ndhist_acct_nbr end) as PIN_TRANS, 
     count(case when ndhist_type = '30' and ndhist_rsn = '21' and ndhist_trcd = 'SC*' and ndhist_ref_type = '0' and ndhist_dt >= '03/01/2013' 
        then ndhist_acct_nbr end) as FOREIGN_AMT_FEE 
from dbo.nd_history 
group by ndhist_acct_nbr) sq

可以这样做如果您正在使用支持CTE的RDBMS（如Oracle，PostgreSQL或SQLServer），那么通过CTE更优雅。

来源

2013-03-21 12:08:35

这是完美的 - 如果我想添加一个最后一块：创建收入的列（NSF_TOTAL）* 5）+（（SIG_SPEND）* 0.10％）+（（PIN_TRANS）* $ 0.05）+（（FOREIGN_ATM_FEE）* $ 1.00 ））作为TOTAL_INCOME – 2013-03-21 12:23:05

@TomMurphy：我已经更新了我的回答，以说明如何完成此工作 - 目前，它正在使用SIG_SPEND的10％;如果您想要0.1％，那么将TOTAL_INCOME的SIG_SPEND组件更改为SIG_SPEND * 0.001。 – 2013-03-21 12:43:31

您的子查询是独立的 - 它们不以任何方式依赖ndhist_acct_nbr字段，因此结果始终相同。

此外，这种技术（对输出的每一行使用这种许多子查询）是一个坏主意。您应该简化查询，而不是count distinct和子查询，使sum(case when ...子句。

来源

2013-03-21 12:08:57

SQL子查询来自同一个表的所有数据

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