用于动态转换行中列值的 SQL 查询

Question

我是 SQL 新手，所以不太了解您是否可以帮助我消除查询 1 中的重复项或帮助我转置查询 2

旧查询 1：我已经尝试过以下查询，但返回了一些重复值：

select 
    ROW_NUMBER() OVER (ORDER BY count(case when TransactionType = 1 then 1 else null end) desc) AS 'td','',
    Warehouse as 'td','',
    Createdate as 'td','',
    count(case when TransactionType = 1 then 1 else null end) as 'td','',
    count(case when TransactionType = 5 then 1 else null end) as 'td','',
    count(case when TransactionType = 6 then 1 else null end) as 'td','',    
    cast(round(sum(localamount),8) as decimal(18,2))as 'td',''
from
    PaymentTrn (nolock) 
where 
    CreateDate = cast(convert(varchar(8),getdate() -1,112) as int) 
group by 
    Warehouse, CreateDate
order by 
    count(case when TransactionType = 1 then 1 else null end) desc

然后我尝试了计数（当 TransactionType = 1 然后 1 else null end 时的不同情况）但只给出 1。

对于查询 2（如下所示），在 DB invoice-type、transaction-type 和仓库中有 3 个（有用的）列，我需要从中获取数据。

重要提示：发票号码重复，所以我需要使用不同的

因为我得到了重复的值，所以我修改了查询，现在我需要将“无列名”列转换为行

查询的当前输出是：

warehouse    no column name
1700             3
1700             6
1700             9

查询 2：

select warehouse,count(distinct(invoicenumber))
from PaymentTrn (nolock)
where CreateDate = cast(convert(varchar(8),getdate() -305,112) as int) and TransactionType = 1
group by Warehouse,CreateDate

union all

select warehouse,count(distinct(invoicenumber))
from PaymentTrn (nolock)
where CreateDate = cast(convert(varchar(8),getdate() -305,112) as int) and TransactionType = 5
group by Warehouse,CreateDate

union all

select warehouse,count(distinct(invoicenumber))
from PaymentTrn (nolock)
where CreateDate = cast(convert(varchar(8),getdate() -305,112) as int) and TransactionType = 6
group by Warehouse,CreateDate

预期的结果应该是：

warehouse    transactiontype=1       transactiontype=5       transactiontype=6
1700              3                      6                       9

Answer 1

我认为您只需要使用count(distinct) 进行条件聚合。您似乎想计算发票号码：

select row_number() over (order by count(distinct case when TransactionType = 1 then invoicenumber end) desc) AS td, '',
       Warehouse as td, '',
       Createdate as td, '',
       count(distinct case when TransactionType = 1 then invoicenumber end) as td, '',
       count(distinct case when TransactionType = 5 then invoicenumber end) as td, '',
       count(distinct case when TransactionType = 6 then invoicenumber end) as td, '',    
       cast(round(sum(localamount), 8) as decimal(18,2)) as td, ''
from PaymentTrn 
where CreateDate = cast(convert(varchar(8),getdate() -1, 112) as int) 
group by Warehouse, CreateDate
order by 1;

Answer 2

这是您的疑问。

查询 1：

select t2.rownum as 'td',''
    , t1.Warehouse as 'td',''
    , t1.Createdate as 'td',''
    , t2.cnt as 'td',''
    , t3.cnt as 'td',''
    , t4.cnt as 'td',''
    , cast(round(sum(t1.localamount),8) as decimal(18,2))as 'td',''
from 
PaymentTrn t1
left join
    (select ROW_NUMBER() OVER (ORDER BY count(1) desc) as rownum, Warehouse
    from
        PaymentTrn (nolock) 
    where TransactionType = 1 and CreateDate = cast(convert(varchar(8),getdate() -1,112) as int) 
    group by Warehouse) t2 on t2.Warehouse = t1.Warehouse
left join
    (select count(1) as cnt, Warehouse
    from
        PaymentTrn (nolock) 
    where TransactionType = 5 and CreateDate = cast(convert(varchar(8),getdate() -1,112) as int) 
    group by Warehouse) t3 on t3.Warehouse = t1.Warehouse
left join
    (select count(1) as cnt, Warehouse
    from
        PaymentTrn (nolock) 
    where TransactionType = 6 and CreateDate = cast(convert(varchar(8),getdate() -1,112) as int) 
    group by Warehouse) t4 on t4.Warehouse = t1.Warehouse
where 
    t1.CreateDate = cast(convert(varchar(8),getdate() -1,112) as int) 
order by t2.rownum desc

查询 2：

select t1.warehouse, count(distinct(t1.invoicenumber)) as TType1, t2.cnt as TType2, t3.cnt as TType3
from PaymentTrn  t1
left join
    (select Warehouse, count(distinct(invoicenumber)) as cnt from PaymentTrn 
     where CreateDate = cast(convert(varchar(8),getdate() -305,112) as int) and TransactionType = 1 group by customer_code) t2
    on t2.Warehouse = t1.Warehouse
left join
    (select Warehouse, count(distinct(invoicenumber)) as cnt from PaymentTrn 
     where CreateDate = cast(convert(varchar(8),getdate() -305,112) as int) and TransactionType = 1 group by customer_code) t3
    on t3.Warehouse = t1.Warehouse
where t1.CreateDate = cast(convert(varchar(8),getdate() -305,112) as int) and t1.TransactionType = 1
group by t1.Warehouse, t2.TType2, t3.TType3