Microsoft SQL query to view - sql

Question

I have this complex query that i want to turn into a view.
This query comes from https://snippets.cacher.io/snippet/3e84b01b7d52b4ca7807 and i want to save it in a view or even as a table if possible.
`
/*##=============================================*/
/*## QUERY BODY */
/*##=============================================*/
/* #region QueryBody */
/* Testing variables !! Need to be commented for Production !! */
-- DECLARE #UserSIDs AS NVARCHAR(10) = 'Disabled';
-- DECLARE #CollectionID AS NVARCHAR(10) = 'SMS00001';
-- DECLARE #Locale AS INT = 2;
-- DECLARE #Categories AS NVARCHAR(250) = 'Tools';
-- DECLARE #Compliant AS INT = 0;
-- DECLARE #Targeted AS INT = 1;
-- DECLARE #Superseded AS INT = 0;
-- DECLARE #ArticleID AS NVARCHAR(10) = '';
-- DECLARE #ExcludeArticleIDs AS NVARCHAR(250) = '';
/* Variable declaration */
DECLARE #LCID AS INT = dbo.fn_LShortNameToLCID(#Locale);
DECLARE #HelperFunctionExists AS INT = 0;
/* Perform cleanup */
IF OBJECT_ID('tempdb..#MaintenanceInfo', 'U') IS NOT NULL
DROP TABLE #MaintenanceInfo;
/* Check for helper function */
IF OBJECT_ID('[dbo].[ufn_CM_GetNextMaintenanceWindow]') IS NOT NULL
SET #HelperFunctionExists = 1;
/* Initialize HealthState descriptor table */
DECLARE #HealthState TABLE (
BitMask INT
, StateName NVARCHAR(250)
)
/* Populate HealthState table */
INSERT INTO #HealthState (BitMask, StateName)
VALUES
('0', 'Healthy')
, ('1', 'Unmanaged')
, ('2', 'Inactive')
, ('4', 'Health Evaluation Failed')
, ('8', 'Pending Restart')
, ('16', 'Update Scan Failed')
, ('32', 'Update Scan Late')
, ('64', 'No Maintenance Window')
, ('128', 'Distant Maintenance Window')
, ('256', 'Expired Maintenance Window')
/* Initialize ClientState descriptor table */
DECLARE #ClientState TABLE (
BitMask INT
, StateName NVARCHAR(100)
)
/* Populate ClientState table */
INSERT INTO #ClientState (BitMask, StateName)
VALUES
('0', 'No Reboot')
, ('1', 'Configuration Manager')
, ('2', 'File Rename')
, ('4', 'Windows Update')
, ('8', 'Add or Remove Feature')
CREATE TABLE #MaintenanceInfo (
ResourceID INT
, NextServiceWindow DATETIME
)
/* Get maintenance data */
IF #HelperFunctionExists = 1
BEGIN
WITH Maintenance_CTE AS (
SELECT
CollectionMembers.ResourceID
, NextServiceWindow.Duration
, NextServiceWindow.NextServiceWindow
, RowNumber = DENSE_RANK() OVER (PARTITION BY ResourceID ORDER BY NextServiceWindow.NextServiceWindow)
, ServiceWindowType
, ServiceWindow.Enabled
FROM vSMS_ServiceWindow AS ServiceWindow
JOIN fn_rbac_FullCollectionMembership(#UserSIDs) AS CollectionMembers ON CollectionMembers.CollectionID = ServiceWindow.SiteID
JOIN fn_rbac_Collection(#UserSIDs) AS Collections ON Collections.CollectionID = CollectionMembers.CollectionID
AND Collections.CollectionType = 2 -- Device Collections
CROSS APPLY ufn_CM_GetNextMaintenanceWindow(ServiceWindow.Schedules, ServiceWindow.RecurrenceType) AS NextServiceWindow
WHERE NextServiceWindow.NextServiceWindow IS NOT NULL
AND ServiceWindowType <> 5 -- OSD Service
)
/* Populate MaintenanceInfo table and remove duplicates */
INSERT INTO #MaintenanceInfo(ResourceID, NextServiceWindow)
SELECT
ResourceID
, NextServiceWindow
FROM Maintenance_CTE
WHERE RowNumber = 1
END
/* Get update data */
;
WITH UpdateInfo_CTE
AS (
SELECT
ResourceID = Systems.ResourceID
, Missing = COUNT(*)
FROM fn_rbac_R_System(#UserSIDs) AS Systems
JOIN fn_rbac_UpdateComplianceStatus(#UserSIDs) AS ComplianceStatus ON ComplianceStatus.ResourceID = Systems.ResourceID
AND ComplianceStatus.Status = 2 -- Filter on 'Required' (0 = Unknown, 1 = NotRequired, 2 = Required, 3 = Installed)
JOIN fn_rbac_ClientCollectionMembers(#UserSIDs) AS CollectionMembers ON CollectionMembers.ResourceID = ComplianceStatus.ResourceID
JOIN fn_rbac_UpdateInfo(#LCID, #UserSIDs) AS UpdateCIs ON UpdateCIs.CI_ID = ComplianceStatus.CI_ID
AND UpdateCIs.IsSuperseded IN (#Superseded)
AND UpdateCIs.CIType_ID IN (1, 8) -- Filter on 1 Software Updates, 8 Software Update Bundle (v_CITypes)
AND UpdateCIs.ArticleID NOT IN ( -- Filter on ArticleID csv list
SELECT VALUE FROM STRING_SPLIT(#ExcludeArticleIDs, ',')
)
AND UpdateCIs.Title NOT LIKE ( -- Filter Preview updates
'[1-9][0-9][0-9][0-9]-[0-9][0-9]_Preview_of_%'
)
JOIN fn_rbac_CICategoryInfo_All(#LCID, #UserSIDs) AS CICategory ON CICategory.CI_ID = ComplianceStatus.CI_ID
AND CICategory.CategoryTypeName = 'UpdateClassification'
AND CICategory.CategoryInstanceName IN (#Categories) -- Filter on Selected Update Classification Categories
LEFT JOIN fn_rbac_CITargetedMachines(#UserSIDs) AS Targeted ON Targeted.ResourceID = ComplianceStatus.ResourceID
AND Targeted.CI_ID = ComplianceStatus.CI_ID
WHERE CollectionMembers.CollectionID = #CollectionID
AND IIF(Targeted.ResourceID IS NULL, 0, 1) IN (#Targeted) -- Filter on 'Targeted' or 'NotTargeted'
AND IIF(UpdateCIs.ArticleID = #ArticleID, 1, 0) = IIF(#ArticleID <> '', 1, 0)
GROUP BY
Systems.ResourceID
)
/* Get device info */
SELECT
Systems.ResourceID
/* Set Health states. You can find the coresponding values in the HealthState table above */
, HealthStates = (
IIF(CombinedResources.IsClient != 1, POWER(1, 1), 0)
+
IIF(
ClientSummary.ClientStateDescription = 'Inactive/Pass'
OR
ClientSummary.ClientStateDescription = 'Inactive/Fail'
OR
ClientSummary.ClientStateDescription = 'Inactive/Unknown'
, POWER(2, 1), 0)
+
IIF(
ClientSummary.ClientStateDescription = 'Active/Fail'
OR
ClientSummary.ClientStateDescription = 'Inactive/Fail'
, POWER(4, 1), 0
)
+
IIF(CombinedResources.ClientState != 0, POWER(8, 1), 0)
+
IIF(UpdateScan.LastErrorCode != 0, POWER(16, 1), 0)
+
IIF(UpdateScan.LastScanTime < (SELECT DATEADD(dd, -14, CURRENT_TIMESTAMP)), POWER(32, 1), 0)
+
IIF(ISNULL(NextServiceWindow, 0) = 0 AND #HelperFunctionExists = 1, POWER(64, 1), 0)
+
IIF(NextServiceWindow > (SELECT DATEADD(dd, 30, CURRENT_TIMESTAMP)), POWER(128, 1), 0)
+
IIF(NextServiceWindow < (CURRENT_TIMESTAMP), POWER(256, 1), 0)
)
, Missing = ISNULL(Missing, (IIF(CombinedResources.IsClient = 1, 0, NULL)))
, Device = (
IIF(
SystemNames.Resource_Names0 IS NOT NULL, UPPER(SystemNames.Resource_Names0)
, IIF(Systems.Full_Domain_Name0 IS NOT NULL, Systems.Name0 + '.' + Systems.Full_Domain_Name0, Systems.Name0)
)
)
, OperatingSystem = (
CASE
WHEN OperatingSystem.Caption0 != '' THEN
CONCAT(
REPLACE(OperatingSystem.Caption0, 'Microsoft ', ''), -- Remove 'Microsoft ' from OperatingSystem
REPLACE(OperatingSystem.CSDVersion0, 'Service Pack ', ' SP') -- Replace 'Service Pack ' with ' SP' in OperatingSystem
)
ELSE (
/* Workaround for systems not in GS_OPERATING_SYSTEM table */
CASE
WHEN CombinedResources.DeviceOS LIKE '%Workstation 6.1%' THEN 'Windows 7'
WHEN CombinedResources.DeviceOS LIKE '%Workstation 6.2%' THEN 'Windows 8'
WHEN CombinedResources.DeviceOS LIKE '%Workstation 6.3%' THEN 'Windows 8.1'
WHEN CombinedResources.DeviceOS LIKE '%Workstation 10.0%' THEN 'Windows 10'
WHEN CombinedResources.DeviceOS LIKE '%Server 6.0' THEN 'Windows Server 2008'
WHEN CombinedResources.DeviceOS LIKE '%Server 6.1' THEN 'Windows Server 2008R2'
WHEN CombinedResources.DeviceOS LIKE '%Server 6.2' THEN 'Windows Server 2012'
WHEN CombinedResources.DeviceOS LIKE '%Server 6.3' THEN 'Windows Server 2012 R2'
WHEN Systems.Operating_System_Name_And0 LIKE '%Server 10%' THEN (
CASE
WHEN CAST(REPLACE(Build01, '.', '') AS INTEGER) > 10017763 THEN 'Windows Server 2019'
ELSE 'Windows Server 2016'
END
)
ELSE Systems.Operating_System_Name_And0
END
)
END
)
, LastBootTime = (
CONVERT(NVARCHAR(16), OperatingSystem.LastBootUpTime0, 120)
)
, PendingRestart = (
CASE
WHEN CombinedResources.IsClient = 0
OR CombinedResources.ClientState = 0
THEN NULL
ELSE (
STUFF(
REPLACE(
(
SELECT '#!' + LTRIM(RTRIM(StateName)) AS [data()]
FROM #ClientState
WHERE BitMask & CombinedResources.ClientState <> 0
FOR XML PATH('')
),
' #!',', '
),
1, 2, ''
)
)
END
)
, ClientState = (
CASE CombinedResources.IsClient
WHEN 1 THEN ClientSummary.ClientStateDescription
ELSE 'Unmanaged'
END
)
, ClientVersion = CombinedResources.ClientVersion
, LastUpdateScan = (
CONVERT(NVARCHAR(16), UpdateScan.LastScanTime, 120)
)
, LastScanLocation = NULLIF(UpdateScan.LastScanPackageLocation, '')
, LastScanError = NULLIF(UpdateScan.LastErrorCode, 0)
, NextServiceWindow = IIF(CombinedResources.IsClient != 1, NULL, CONVERT(NVARCHAR(16), NextServiceWindow, 120))
FROM fn_rbac_R_System(#UserSIDs) AS Systems
JOIN fn_rbac_CombinedDeviceResources(#UserSIDs) AS CombinedResources ON CombinedResources.MachineID = Systems.ResourceID
LEFT JOIN fn_rbac_RA_System_ResourceNames(#UserSIDs) AS SystemNames ON SystemNames.ResourceID = Systems.ResourceID
LEFT JOIN fn_rbac_GS_OPERATING_SYSTEM(#UserSIDs) AS OperatingSystem ON OperatingSystem.ResourceID = Systems.ResourceID
LEFT JOIN fn_rbac_CH_ClientSummary(#UserSIDs) AS ClientSummary ON ClientSummary.ResourceID = Systems.ResourceID
LEFT JOIN fn_rbac_UpdateScanStatus(#UserSIDs) AS UpdateScan ON UpdateScan.ResourceID = Systems.ResourceID
LEFT JOIN #MaintenanceInfo AS Maintenance ON Maintenance.ResourceID = Systems.ResourceID
LEFT JOIN UpdateInfo_CTE AS UpdateInfo ON UpdateInfo.ResourceID = Systems.ResourceID
JOIN fn_rbac_FullCollectionMembership(#UserSIDs) AS CollectionMembers ON CollectionMembers.ResourceID = Systems.ResourceID
WHERE CollectionMembers.CollectionID = #CollectionID
AND (
CASE -- Compliant (0 = No, 1 = Yes, 2 = Unknown)
WHEN Missing = 0 OR (Missing IS NULL AND Systems.Client0 = 1) THEN 1 -- Yes
WHEN Missing > 0 AND Missing IS NOT NULL THEN 0 -- No
ELSE 2 -- Unknown
END
) IN (#Compliant)
/* Perform cleanup */
IF OBJECT_ID('tempdb..#MaintenanceInfo', 'U') IS NOT NULL
DROP TABLE #MaintenanceInfo;
/* #endregion */
/*##=============================================*/
/*## END QUERY BODY */
/*##=============================================*/
`
Is there an easy way to achieve this?
I have tried to look at the official Microsoft documentation but are still not able to convert the query to a view. https://learn.microsoft.com/en-us/sql/t-sql/statements/create-view-transact-sql?view=sql-server-ver16
As I am new to SQL language I am not sure where to start.

Answer 1

So I agree with Larnu, that this probably doesn't make a ton of sense. But there are cases where one might want to be able to run multiple batches of queries / procedural code from an object that's as consumable as a view. I've done this once in a case where I needed to maximize my options for performance tuning without losing the consumability of the object. So for the sake of when it does make sense, this is something you could do:
Wrap your code in a stored procedure.
Use OPENQUERY() to call your procedure.
Wrap the OPENQUERY() call in a view.
Limitations with this methodology is it's rather static:
You can't pass parameters to your stored procedure
If you use temp tables in your stored procedure, then you need to use the WITH RESULT SETS clause to explicitly define the shape of your result set
The procedure can only return one result set
The SQL Server Engine puts a hard-coded cardinality estimate of 10,000 against OPENQUERY(). So in cases where your procedure returns a lot more rows (typically an order of magnitude or more) than 10,000, e.g. 1 million rows, then you may experience some performance issues with joining the wrapper view to other objects.
Example:
-- Step 1: Wrap the procedural code in a stored procedure
CREATE PROCEDURE dbo.RunSomeCode
AS
BEGIN
CREATE TABLE #Results (ID INT, SomeValue VARCHAR(100));
DECLARE #SomeVariable INT = 0;
WHILE (#SomeVariable < 5)
BEGIN
SET #SomeVariable = #SomeVariable + 1;
INSERT INTO #Results (ID, SomeValue)
SELECT ID, SomeValue
FROM SomeTable
WHERE ID = #SomeVariable
END
SELECT ID, SomeValue
FROM #Results;
END
GO
-- Step 2 & 3: Wrap an OPENQUERY() call to the procedure in a view.
CREATE VIEW dbo.SomeView
AS
SELECT ID, SomeValue
FROM OPENQUERY
(
'
LocalServerName,
EXEC dbo.RunSomeCode
WITH RESULT SETS
((
ID INT,
SomeValue VARCHAR(100)
))
'
);
Voila, you can now execute the procedure by SELECTing from the view:
SELECT ID, SomeValue
FROM dbo.SomeView;