Question

我有一个表订单，它有以下列：

OrderID, ClientID, BankNumber, Adres, Name;

我想写一个给我这个结果的查询：一行中有明确的clientid名称和adres以及所有归属订单和一行上相应的bankaccount数字：这是我的例子。

ClientID    Adres   Name    order1  Banknumber  Order2  Banknumber  order3  Banknumber

Answer 1

首先，您无法查询某些内容并提出具有无限列数的结果集，但您可以将订单合并并在1列中显示。

如果你在SQL Azure或SQL2017上，你也可以像这样使用STRING_AGG：

select customer.Id, customer.Name, orderSummary.orderData
(select  STRING_AGG(orderID+'-'+banknumber+', ') as orderData from orders where customerId = customer.Id)  orderSummary
from Customers as  customer

您可以查看此帖子以获取更多答案 How to concatenate text from multiple rows into a single text string in SQL server? 和Microsoft的子查询： https://technet.microsoft.com/en-us/library/ms189575(v=sql.105).aspx

Answer 2

这是一份工作样本。希望对你有效。

您需要动态构建Order1，order2，order3 ...和BankNumber1，BankNumber2 ....我在我的例子中有硬编码

drop table #t1
create table #t1(OrderID Int, ClientID int, BankNumber varchar(50), [Address] varchar(50), Name varchar(50))

insert into #t1
select 1,11,'111','xyz1','xyz'
union all
select 2,22,'112','xyz2','xyzz'
union all
select 3,33,'113','xyz3','xyzzz'
union all
select 100,11,'111','xyz1','xyz'
union all
select 200,22,'112','xyz2','xyzz'
union all
select 300,33,'113','xyz3','xyzzz'

;with cte as 
(
    select OrderID,ClientID,BankNumber,Address,Name,ROW_NUMBER()over (partition by clientid order by orderid asc) RN
    from #t1
)
select ClientID
        ,max([Order 1]) Order1
        ,max([Order 2]) Order2
        ,max([BankNumber 1]) BankNumber1
        ,max([BankNumber 2]) BankNumber2
from 
(
    select ClientID,Address,Name,OrderID,BankNumber,'Order '+cast(rn as varchar(10)) OrderSeq
                                                    ,'BankNumber '+cast(rn as varchar(10)) BankNumberSeq
    from cte
) as ST
pivot(max(OrderID) for OrderSeq in ([Order 1],[Order 2])) as pt1 
pivot(max(BankNumber) for BankNumberSeq in ([BankNumber 1],[BankNumber 2])) as pt2
group by ClientID

左边加入左边第1行的所有订单

2 个答案: