我试图获取不同表中每一行的循环结果。我需要知道哪个产品系列，每个销售代理商，在一个月内销售。
我的查询向我展示了如何知道产品系列的总数。我只需要插入其中，＆＃34; CODAGENT＆＃34;在where where条件下，通过Agents TABLE中的每个代理循环。所以不要用sql语言做一个例子。
-----THIS IS NOT A USEFUL CODE, IT'S ONLY FOR UNDERSTANDING----
For Each Row in Agents TAble Do
Set #CODAGENT = Row 1,2,3,....
Select
-routine for selecting what i need with inside WHERE CODAGENT = #CODAGENT
Next Row
-----THIS IS NOT A USEFUL CODE, IT'S ONLY FOR UNDERSTANDING----
我需要获得此结果，但需要在每个代理的单独表中
SELECT
TABCATEGORIE.DESCRIZIONE,
TABCATEGORIESTAT.DESCRIZIONE,
LEFT(SUM(TOTNETTORIGA),LEN(SUM(TOTNETTORIGA))-2),
TABGRUPPI.DESCRIZIONE,
ANAGRAFICAAGENTI.CODAGENTE,
ANAGRAFICAAGENTI.DSCAGENTE
FROM dbo.TESTEDOCUMENTI
INNER JOIN dbo.RIGHEDOCUMENTI ON PROGRESSIVO=IDTESTA
INNER JOIN dbo.ANAGRAFICAARTICOLI
ON CODART=ANAGRAFICAARTICOLI.CODICE
INNER JOIN dbo.TABCATEGORIE ON CATEGORIA=TABCATEGORIE.CODICE
INNER JOIN dbo.TABCATEGORIESTAT ON CODCATEGORIASTAT=TABCATEGORIESTAT.CODICE
INNER JOIN dbo.TABGRUPPI ON GRUPPO=TABGRUPPI.CODICE
INNER JOIN dbo.ANAGRAFICAAGENTI ON ANAGRAFICAAGENTI.CODAGENTE=CODAGENTE1
WHERE dbo.TESTEDOCUMENTI.DOCCHIUSO = '0' AND dbo.TESTEDOCUMENTI.TIPODOC = 'FVC' AND dbo.TESTEDOCUMENTI.DATADOC BETWEEN DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-2, 0) AND DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE())-2, -1)
GROUP BY GRUPPO,CATEGORIA,CODCATEGORIASTAT,TABCATEGORIE.DESCRIZIONE,TABCATEGORIESTAT.DESCRIZIONE,TABGRUPPI.DESCRIZIONE,ANAGRAFICAAGENTI.CODAGENTE,ANAGRAFICAAGENTI.DSCAGENTE
ORDER BY CODAGENTE DESC
它是意大利语，我不知道你是否明白
Sample Data
ANAGRAFICAAGENTI
CODAGENTE | DSCAGENTE
A1 | Agent Name
then there is the result of the query. So The result is
CATEGORY | CATEGORY2 |TOTNETTORIGA| GRUPPI | CODAGENTE | DSCAGENTE
------------+---------------+------------+------------------+-----------+----------
TAVOLI | TAVOLI | 22571.36 | PRODOTTO FINITO | A 77 | name
PENSILI | PENSILI | 1319.12 | PRODOTTO FINITO | A 77 | name
LAVATOIO | LAVATOIO | 7411.08 | PRODOTTO FINITO | A 77 | name
LAVATOIO | MACELLERIA | 505.00 | PRODOTTO FINITO | A 77 | name
MACELLERIA | MACELLERIA | 3762.00 | PRODOTTO FINITO | A 77 | name
LINEA PESCE | LINEA PESCE | 3824.00 | PRODOTTO FINITO | A 77 | name
TAVOLI | TAVOLI | 1073.60 | PRODOTTO FINITO | A 76 | name1
PENSILI | PENSILI | 262.80 | PRODOTTO FINITO | A 76 | name1
实现了我的目标，但仍然无法实现这一新步骤。这是我的问题：
---CREO IL CURSORE C PER CALCOLARE GLI AGENTI---
DECLARE c CURSOR FOR
SELECT DISTINCT
ANAGRAFICAAGENTI.CODAGENTE
FROM dbo.ANAGRAFICAAGENTI
----DICHIARO LA VARIABILE PER AGENTE
DECLARE @AgentID VARCHAR(4)
----PRENDI IL PRIMO AGENTE E METTILO NELLA VARIABILE----
OPEN c
FETCH NEXT FROM c INTO @AgentID
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT
ANAGRAFICAAGENTI.DSCAGENTE,
ANAGRAFICAAGENTI.CODAGENTE,
TABCATEGORIE.DESCRIZIONE,
TABCATEGORIESTAT.DESCRIZIONE,
LEFT(SUM(TOTNETTORIGA),LEN(SUM(TOTNETTORIGA))-2),
TABGRUPPI.DESCRIZIONE
FROM dbo.TESTEDOCUMENTI
INNER JOIN dbo.RIGHEDOCUMENTI ON PROGRESSIVO=IDTESTA
INNER JOIN dbo.ANAGRAFICAARTICOLI
ON CODART=ANAGRAFICAARTICOLI.CODICE
INNER JOIN dbo.TABCATEGORIE ON CATEGORIA=TABCATEGORIE.CODICE
INNER JOIN dbo.TABCATEGORIESTAT ON CODCATEGORIASTAT=TABCATEGORIESTAT.CODICE
INNER JOIN dbo.TABGRUPPI ON GRUPPO=TABGRUPPI.CODICE
LEFT JOIN dbo.ANAGRAFICAAGENTI ON ANAGRAFICAAGENTI.CODAGENTE=CODAGENTE1
WHERE ANAGRAFICAAGENTI.CODAGENTE = @AgentID AND dbo.TESTEDOCUMENTI.DOCCHIUSO = '0' AND dbo.TESTEDOCUMENTI.TIPODOC = 'FVC' AND dbo.TESTEDOCUMENTI.DATADOC BETWEEN DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-2, 0) AND DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE())-2, -1)
GROUP BY GRUPPO,CATEGORIA,CODCATEGORIASTAT,TABCATEGORIE.DESCRIZIONE,TABCATEGORIESTAT.DESCRIZIONE,TABGRUPPI.DESCRIZIONE,ANAGRAFICAAGENTI.CODAGENTE,ANAGRAFICAAGENTI.DSCAGENTE
ORDER BY CODAGENTE DESC,SUM(TOTNETTORIGA) desc
--PRENDI IL PROSSIMO AGENTE---
FETCH NEXT FROM c INTO @AgentID
END
--PULISCI---
CLOSE c
DEALLOCATE c
这让我有不同的表，我认为，表中的每个代理都有一个。但他们都是空的。如果我在WHERE条件中删除ANAGRAFICAAGENTI.CODAGENTE = @AgentID，我获得相同的表，但每个表的结果相同。他们都是平等的。
答案 0 :(得分：1)
SQL最适合基于集合的操作，但是为您的案例使用循环的一种方法是使用CURSOR和FETCH。您需要研究这些并将其正确应用于您的数据，特别是因为您说“获得此结果但在单独的表中”。我不知道您是否要插入新表或只是将结果返回到单独的窗格中。这将帮助您入门
--declare a cursor which will be the ID's of your agents. You can use what ever you want to limit your data off of
DECLARE c CURSOR FOR
SELECT DISTINCT
CODAGENTE
FROM ANAGRAFICAAGENTI
DECLARE @AgentID VARCHAR(4)
--get the first agent id and place it into a variable
OPEN c
FETCH NEXT FROM c INTO @AgentID
--for each agent id, select some data where the agent id equals the current agent id in the cursor
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT
--put your code here for selecting, inserting into a table, etc
WHERE ANAGRAFICAAGENTI.CODAGENTE = @AgentID --or what ever is appropiate
--get the next agent
FETCH NEXT FROM c INTO @AgentID
END
--clean up
CLOSE c
DEALLOCATE c
对于奖励积分，我建议你开始在代码中使用表别名。它将使你和其他人在将来更加清晰。
https://technet.microsoft.com/en-us/library/ms187455(v=sql.105).aspx
SQL Table Aliases - Good or Bad?
SAMPLE SET
点击HERE以运行以下代码...
IF OBJECT_ID('tempdb..#agents') IS NOT NULL DROP TABLE #agents
IF OBJECT_ID('tempdb..#items') IS NOT NULL DROP TABLE #items
create table #agents (AgentID varchar(2), name varchar(50))
insert into #agents values
('A1','Julius Cesar'),
('B2','Albert Einstien')
create table #items (AgentID varchar(2), ItemID int, ItemName varchar(50))
insert into #items (AgentID, ItemID, ItemName) values
('A1',1,'Apple'),
('A1',2,'Pear'),
('A1',3,'Watermelon'),
('A1',4,'Grape'),
('B2',5,'Car'),
('B2',6,'Truck'),
('B2',7,'Van')
DECLARE c CURSOR FOR
SELECT DISTINCT
AgentID
FROM #agents
DECLARE @AgentID VARCHAR(4)
--get the first agent id and place it into a variable
OPEN c
FETCH NEXT FROM c INTO @AgentID
--for each agent id, select some data where the agent id equals the current agent id in the cursor
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT
AgentID, ItemID, ItemName
FROM #items
WHERE AgentID = @AgentID --or what ever is appropiate
--get the next agent
FETCH NEXT FROM c INTO @AgentID
END
--clean up
CLOSE c
DEALLOCATE c
答案 1 :(得分：0)
如果我正确地解决了您的问题，那么我认为您可以使用cross apply运算符。
要显示我的意思，请查看一些示例数据。在开始时，我为这样的代理商，产品和交易宣布了三个临时表
declare @Agents table (AgentId int, AgentName nvarchar(max));
declare @Products table (ProductId int, ProductName nvarchar(max), Price money);
declare @Transactions table (TransactionId int, TransactionDate date, AgentId int, ProductId int, Quantity int);
然后我用这样的样本数据填充表格
insert into @Agents
values (1, N'Agnet1'), (2, N'Agent2'), (3, N'Agent3'), (4, N'Agent4');
insert into @Products
values (1, N'Product1', 100), (2, N'Product2', 150.50), (3, N'Product3', 200), (4, N'Product4', 50.23);
insert into @Transactions
values (1, '20160604', 1, 1, 5), (2, '20160704', 2, 1, 10), (3,'20160612', 2, 1, 15), (4, '20160604', 1, 2, 7),
(5, '20160720', 3, 4, 1), (6, '20160604', 2, 4, 3), (7, '20160730', 4, 3, 8), (8, '20160612', 2, 3, 13),
(9, '20160708', 4, 2, 6), (10, '20160705', 1, 3, 1), (11, '20160616', 4, 2, 17), (12, '20160709', 2, 3, 13);
通过该示例数据，我已准备好此查询以获取每个代理的统计信息
declare @year int;
declare @month int;
select a.AgentName,
trans.ProductName,
trans.Amount
from @Agents as a
cross apply
( select t.ProductId,
max(p.ProductName) as ProductName,
sum(t.Quantity * p.Price) as Amount
from @Transactions as t
inner join @Products as p on p.ProductId = t.ProductId
where t.AgentId = a.AgentId
and year(t.TransactionDate) = @year
and month(t.TransactionDate) = @month
group by t.ProductId) as trans
对于输出中的@year = 2016和@month = 6，您可以看到此
AgentName ProductName Amount
Agnet1 Product1 500,00
Agnet1 Product2 1053,50
Agent2 Product1 1500,00
Agent2 Product3 2600,00
Agent2 Product4 150,69
Agent4 Product2 2558,50
对于@year = 2016和@month = 7，你会看到这个
AgentName ProductName Amount
Agnet1 Product3 200,00
Agent2 Product1 1000,00
Agent2 Product3 2600,00
Agent3 Product4 50,23
Agent4 Product2 903,00
Agent4 Product3 1600,00
正如您所看到的那样，我要求每个代理表@Agents表，并为每个表执行额外的查询，从@Transactions表中检索有关产品和总金额的数据。< / p>