T-SQL组检查

Question

我有三个表-Table_1，Table_2和Table_3。 如下所示：

表格1

   ID  | TicketID | Rule  
---------------------------
    1  |    101   | NULL

表_2

    TicketID | Location
---------------------------  
       101   | A
       101   | B

表3

Location | Rule
--------------------
    A    |  R1
    B    |  R1
    A    |  R2
    B    |  R2
    C    |  R2

我的目标是填充Table_1中的Rule列（应该与Table_3中的Rule列区别开来）。 该过程应为：

• 从Table_1中获取TicketID。 在TicketID上将Table_1与Table_2连接起来，并获取与该票证关联的位置。
• 查找Table_3并检查需要应用哪些规则。 检查需要在组级别。 例如，在此示例中，票证101具有位置A，B。 Table_3在规则R1中具有A，B，但在规则R2中具有A，B，C。 正确的规则应为R1，因为票证101没有分配给位置C。希望这有意义。 实现这一目标的最简单方法是什么？ 提前致谢！

Answer 1

请尝试以下代码。 在SQL Server 2012中可以正常工作。

DECLARE @table_1 TABLE
(ID int, TicketID int, [Rule] Varchar(10))

DECLARE @table_2 TABLE
(TicketID int, Location Varchar(10))

DECLARE @table_3 TABLE
(Location Varchar(10),[Rule] Varchar(10))

INSERT @table_1
(ID,TicketID,[Rule])
VALUES
(1,101,NULL)

INSERT @table_2
(TicketID,Location)
VALUES
(101,'A'),
(101,'B')

INSERT @table_3
(Location,[Rule])
VALUES
('A','R1'),
('B','R1'),
('A','R2'),
('B','R2'),
('C','R2')

SELECT DISTINCT [RULE] FROM @table_3 t3 WHERE t3.Location IN
(SELECT t2.Location FROM @table_2 t2 INNER JOIN @table_1 t1 ON t1.TicketID = t2.TicketID)
AND [RULE] NOT IN 
(SELECT t.[RULE] FROM @table_3 t WHERE t.Location NOT IN 
(SELECT t2.Location FROM @table_2 t2 INNER JOIN @table_1 t1 ON t1.TicketID = t2.TicketID))

Answer 2

尝试这个..

SELECT t1.TicketID
,t2.[Rule]
FROM (SELECT DISTINCT t2.TicketID,[Rule]
FROM @table_3 t3 INNER JOIN 
     @table_2 t2 ON t2.Location = t3.Location) t2
INNER JOIN @table_1 t1 ON t2.TicketID = t1.TicketID

将此select语句与上面声明的表变量一起使用

Answer 3

--http://stackoverflow.com/questions/37344006/t-sql-group-check
set nocount on
drop table #temp
DECLARE @table_1 TABLE
(ID int, TicketID int, [Rule] Varchar(10))

DECLARE @table_2 TABLE
(TicketID int, Location Varchar(10),obs int)

DECLARE @table_3 TABLE
(Location Varchar(10),[Rule] Varchar(10), obs int)

INSERT @table_1
(ID,TicketID,[Rule])
VALUES
(1,101,NULL)

INSERT @table_2
(TicketID,Location)
VALUES
(101,'A'),
(101,'B'),
--(101,'C')
(102,'A'),
(102,'B'),
(102,'C'),
(102,'S')

INSERT @table_3
(Location,[Rule])
VALUES
('A','R1'),
('B','R1'),
('A','R2'),
('B','R2'),
('C','R2'),
('S','R2')

declare @table_4 table (src varchar(2), id varchar(3), obs int)
insert into @table_4
select  't2', [ticketid], count(*) from @table_2 group by [ticketid]

Insert into @table_4
select  't3',[rule], count(*) from @table_3 group by [rule]

update  @table_2
set     obs = t4.obs
from    @table_2 t2
join    @table_4 t4 on t4.id = t2.ticketid
where   t4.src = 't2' 

update  @table_3
set     obs = t4.obs
from    @table_3 t3
join    @table_4 t4 on  rtrim(t4.id) = rtrim(t3.[rule])
where   t4.src = 't3'

select  t2.ticketid,t2.location as t2location,t2.obs as t2obs,t3.location as t3location,t3.[Rule],t3.obs as t3obs
into    #temp
from    @table_2 t2
full    join    @table_3 t3 on t3.location = t2.location

delete  #temp
where   [rule] in (select [rule] from #temp where ticketid is null)     

--select  t.*
--from  #temp t

select  distinct ticketid,[rule]
from    #temp
where   t2location = t3location and t2obs = t3obs 

Answer 4

试试这个代码：

SELECT DISTINCT [RULE] FROM Table_3 t3 WHERE t3.Location IN
(SELECT t2.Location FROM Table_2 t2 INNER JOIN Table_1 t1 ON t1.TicketID = t2.TicketID)
AND [RULE] NOT IN 
(SELECT t.[RULE] FROM Table_3 t WHERE t.Location NOT IN 
(SELECT t2.Location FROM Table_2 t2 INNER JOIN Table_1 t1 ON t1.TicketID = t2.TicketID))