[SOLUTION] SQL Where not exists in same table

SQL Where not exists in same table

I'm trying to insert into table with the not in condition
but doesn't seem to work

Here is the data

VCENTER      ALERT
A-PROD      Alert
A-PROD      Warning
A-UAT      NULL
B-UAT      NULL
C-PROD      Warning
C-UAT      NULL
D-PROD      Alert
E-PROD      NULL

Here is my sql

DECLARE @AMRSVCentersIDX TABLE
            (
                  [VCENTER] nvarchar(200),
                  [ALERT] varchar(20),
                  [ID] int
            )



            INSERT INTO @AMRSVCentersIDX
            SELECT DISTINCT tgh.[ENVIRONMENT], RIGHT(tha.AlertType, CHARINDEX(' ', REVERSE(tha.AlertType)) - 1) as [ALERT],
            ROW_NUMBER() OVER (Order by tgh.[ENVIRONMENT]) AS [ID]
            FROM [Reporting].[dbo].[tblGEN2_HOSTS] tgh WITH (NOLOCK)
            LEFT JOIN (SELECT DISTINCT [DataCenter], [AlertType] FROM [Reporting].[dbo].[tblHostAlerts] WITH (NOLOCK) WHERE [Duration] >= 10) tha ON tgh.[ENVIRONMENT] = tha.[DataCenter]
            WHERE tgh.[ENVIRONMENT] NOT LIKE '%DEV%' AND tgh.[REGION] = 'AMRS'
            AND tgh.[ENVIRONMENT] NOT IN (SELECT '''' + [VCENTER] + '''' as [ENVIRONMENT] FROM @AMRSVCentersIDX)

What I expect to be inserted into the temp table is

VCENTER      ALERT      ID
A-PROD      Alert      1
A-UAT      NULL      2
B-UAT      NULL      3
C-PROD      Warning      4
C-UAT      NULL      5
D-PROD      Alert      6
E-PROD      NULL      7

Any help would be most appreciated

Regards,
M

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LVL 4

Mauro CazabonnetSenior .NET Software EngineerAuthor Commented: 2016-09-07

Note:
If an alert and warning exists for both I would only want to show the alert

LVL 143

Guy Hengel [angelIII / a3]Billing EngineerCommented: 2016-09-07

this should do it:

INSERT INTO @AMRSVCentersIDX
select ENVIRONMENT, ALERT, ID
from (
SELECT tgh.[ENVIRONMENT], RIGHT(tha.AlertType, CHARINDEX(' ', REVERSE(tha.AlertType)) - 1) as [ALERT]
, ROW_NUMBER() OVER (partition by tgh.[ENVIRONMENT] ) AS [RN ]
, ROW_NUMBER() OVER (order tgh.[ENVIRONMENT] ) AS [ID]
FROM [Reporting].[dbo].[tblGEN2_HOSTS] tgh WITH (NOLOCK)
LEFT JOIN (SELECT DISTINCT [DataCenter], [AlertType] FROM [Reporting].[dbo].[tblHostAlerts] WITH (NOLOCK) WHERE [Duration] >= 10) tha ON tgh.[ENVIRONMENT] = tha.[DataCenter]
WHERE tgh.[ENVIRONMENT] NOT LIKE '%DEV%' AND tgh.[REGION] = 'AMRS'
AND tgh.[ENVIRONMENT] NOT IN (SELECT '''' + [VCENTER] + '''' as [ENVIRONMENT] FROM @AMRSVCentersIDX)
) x
where x.rn = 1

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Awesome thx!!!!!!!

needed order by with partition by

Final result

INSERT INTO @AMRSVCentersIDX
            SELECT ENVIRONMENT, ALERT, ROW_NUMBER() OVER (Order by [ENVIRONMENT]) [ID]
            FROM (
            SELECT tgh.[ENVIRONMENT], RIGHT(tha.AlertType, CHARINDEX(' ', REVERSE(tha.AlertType)) - 1) as [ALERT],
                   Row_number()
                   OVER (
                        partition by tgh.[ENVIRONMENT]
                        ORDER BY tha.[DATACENTER]) [RN]
FROM [Reporting].[dbo].[tblGEN2_HOSTS] tgh WITH (NOLOCK)
LEFT JOIN (SELECT DISTINCT [DataCenter], [AlertType] FROM [Reporting].[dbo].[tblHostAlerts] WITH (NOLOCK) WHERE [Duration] >= 10) tha ON tgh.[ENVIRONMENT] = tha.[DataCenter]
WHERE tgh.[ENVIRONMENT] NOT LIKE '%DEV%' AND tgh.[REGION] = 'AMRS' AND tgh.[ENVIRONMENT] NOT IN (SELECT [VCENTER] FROM @AMRSVCentersIDX)

                   ) x
                   WHERE x.rn = 1

SQL Where not exists in same table

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