Pivot Query - Missing records

问题

I have a pivot query which works well until now, but there has been a requirement where I need to specify a condition in the unpivot query which would omit the rows and column values which are not matching with the condition and displays me null. However, I need to show those value as a part of final results.

I have tried to do union to include the missing values, but won't get the desired output. I am pasting my pivot query below along with the results which are displayed and which needs to be displayed as a result. Please help.

CURRENT QUERY

SELECT 
    OrderID, AccessName, Address1, Postcode
    , Gen_Instr_1 AS "General Instructions for Install"
    ,Supplier_Name_1 AS "Supplier Name"
    ,Install_Job_Name_1 AS "Install Jobs"
    ,Install_Job_Status_1 AS "Install Job Status"

    ,Install_Job_Name_2 AS "EPR Jobs"
    ,Install_Job_Status_2 AS "EPR Job Status"
FROM
(
    SELECT
    OrderID, AccessName, Address1, Postcode
    , col+'_'+CAST(rn AS VARCHAR(10)) col, 
    val
    FROM
    (
        SELECT o.OrderID, 
            CAST(js.JobStatusID AS VARCHAR(50)) JobStatusId
            , CAST(p.Name AS VARCHAR(50)) Install_Job_Name 
            , o.AccessName, o.Address1, o.Postcode
            , CAST(oj.GeneralInstructions AS VARCHAR(50)) Gen_Instr  
            , CAST(s.CompanyName AS VARCHAR(50)) Supplier_Name 
            , oj.SupplierID 
            , CAST(js.Name AS VARCHAR(50)) Install_Job_Status  
            , ROW_NUMBER() OVER(PARTITION BY o.OrderID ORDER BY o.OrderID) rn
        FROM 
            NEPCCO.Orders o
            INNER JOIN NEPCCO.Clients c ON o.ClientID = c.ClientID
            INNER JOIN NEPCCO.OrderJobs oj ON o.OrderID = oj.OrderID
            INNER JOIN NEPCCO.Suppliers s ON oj.SupplierID = s.SupplierID
            INNER JOIN NEPCCO.Products p ON oj.ProductID = p.ProductID
            INNER JOIN NEPCCO.OrderStatus os ON o.OrderStatusID = os.OrderStatusID
            INNER JOIN NEPCCO.JobStatus js ON oj.JobStatusID = js.JobStatusID
        WHERE
            o.OrderID IN (6981,6860,6982,6983) AND
            (p.ProductID IN (35,36,37,38,38,40,41,42,43) OR  p.ProductID IN (33,34))
            AND s.CompanyName = 'Northern Gas Heating Ltd'
    ) d
    UNPIVOT
    (
        val
        FOR col IN (JobStatusId, Gen_Instr, Supplier_Name,Install_Job_Name, Install_Job_Status)
    ) un
) s
PIVOT
(
    MAX(val)
    FOR col IN (JobStatusID_1, Gen_Instr_1, Supplier_Name_1, Install_Job_Name_1, Install_Job_Status_1,
                JobStatusID_2, Gen_Instr_2, 
                Install_Job_Name_2, Install_Job_Status_2
                )
) piv

CURRENT RESULTS - SEE THE NULL VALUES IN LAST TWO COLUMNS

OrderID AccessName Address1 Postcode SupplierName Install Jobs Install Job Status EPR Jobs EPR Job Status
    6981    Mrs Cespedes    73 Mill Lane    WV11 1DQ    Northern Gas Heating Ltd    GC1 - 28    Complete    NULL    NULL
    6983    Ms A Mirza  122 Pendleford Avenue   WV6 9EN     Northern Gas Heating Ltd    GC1 - 28    Complete    NULL    NULL

Now, if I runn the inner unpivot query as below, I get following records/rows

Inner unpivot query

SELECT o.OrderID, 
            CAST(js.JobStatusID AS VARCHAR(50)) JobStatusId
            , CAST(p.Name AS VARCHAR(50)) Install_Job_Name
            , o.AccessName, o.Address1, o.Postcode
            , CAST(oj.GeneralInstructions AS VARCHAR(50)) Gen_Instr
            , CAST(s.CompanyName AS VARCHAR(50)) Supplier_Name
            , oj.SupplierID 
            , CAST(js.Name AS VARCHAR(50)) Install_Job_Status  
            , ROW_NUMBER() OVER(PARTITION BY o.OrderID ORDER BY o.OrderID) rn1
        FROM 
            NEPCCO.Orders o
            INNER JOIN NEPCCO.Clients c ON o.ClientID = c.ClientID
            INNER JOIN NEPCCO.OrderJobs oj ON o.OrderID = oj.OrderID
            INNER JOIN NEPCCO.Suppliers s ON oj.SupplierID = s.SupplierID
            INNER JOIN NEPCCO.Products p ON oj.ProductID = p.ProductID
            INNER JOIN NEPCCO.OrderStatus os ON o.OrderStatusID = os.OrderStatusID
            INNER JOIN NEPCCO.JobStatus js ON oj.JobStatusID = js.JobStatusID
        WHERE
            o.OrderID IN (6981,6860,6982,6983) AND
            (p.ProductID IN (35,36,37,38,38,40,41,42,43) OR  p.ProductID IN (33,34))

that produces following results

 OrderID AccessName Address1 Postcode SupplierName Install Jobs Install Job Status EPR Jobs EPR Job Status

6860    6   AW EPR  01625555555 1 Gorsey Road   SK9 5DU     OGP 14  Cancelled     1
6981    4   AW EPR  Mrs Cespedes    73 Mill Lane    WV11 1DQ    Ian Barnhurst   1   Complete       1
6981    4   GC1 - 28    Mrs Cespedes    73 Mill Lane    WV11 1DQ    Northern Gas Heating Ltd    403 Complete      2
6982    4   AW EPR Installer    Mr N Singh  115 Oxbarn Avenue   WV3 7HQ     Northern Gas    414 Complete      1
6983    4   AW EPR Installer    Ms A Mirza  122 Pendleford Avenue   WV6 9EN Northern Gas    414 Complete      1
6983    4   GC1 - 28    Ms A Mirza  122 Pendleford Avenue   WV6 9EN     Northern Gas Heating Ltd    403 Complete     2

Problem

Now, if you see carefully the above result set, which has the order id's 6860, 6982, which is not included as a part of above result because it hasn't got the supplier name as Northern Gas Heating Ltd, moreover, the results which are displayed on first query, omits the values from order id's 6981, 6983, also, because they have different suppliers.

Also, if you notice, with the records being displayed in first query, the values with row number 2 are not included.

I tried my best but failed. @bluefeet, your expertise highly required over here. Any clarifications please ask.

来源：https://stackoverflow.com/questions/17366351/pivot-query-missing-records

标签

sql-server

pivot

unpivot