CODEWITHSUNDEEP
sqlsql-server
webminer07
webminer07

Reputation: 313

Check if entry NOT EXISTS in SQL

I am trying to insert data from one table that was imported from an Excel file into another table with the same exact columns. When I go to insert all the data 

    INSERT INTO [NQL_RawData].[dbo].[WM_MFGPNs]
    ([Manufacturer],[MPNWP],[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy])

    SELECT [Manufacturer],dbo.BuildPNWP([MFGPN],0),[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy]

    FROM [NQL_RawData].[dbo].[wm_BulkImport] WHERE Manufacturer = 'MFG NAME'

it comes up with this error message

Msg 2627, Level 14, State 1, Line 1 Violation of PRIMARY KEY constraint 'PK_MFGPNs_1'. Cannot insert duplicate key in object 'dbo.WM_MFGPNs'. The statement has been terminated.

So I changed the query to include WHERE NOT EXISTS 

    INSERT INTO [NQL_RawData].[dbo].[WM_MFGPNs]
    ([Manufacturer],[MPNWP],[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy])

    SELECT [Manufacturer],dbo.BuildPNWP([MFGPN],0),[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy]

    FROM [NQL_RawData].[dbo].[wm_BulkImport] 

    WHERE NOT EXISTS( 
    SELECT [MFGPN] 
    FROM [NQL_RawData].[dbo].[WM_MFGPNs]
    WHERE Manufacturer = 'MFG NAME'     
    )

But I still receive the same error message. Any ideas?

Upvotes: 0

Views: 1497

Answers (1)

StuartLC
StuartLC

Reputation: 107247

At a wild guess, the PK of WM_MFGPNs isn't Manufacturer, but another column, such as MFGPN. Assuming this to be the case, your insert becomes

INSERT INTO [NQL_RawData].[dbo].[WM_MFGPNs]
    ([Manufacturer],[MPNWP],[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy])

    SELECT [Manufacturer],dbo.BuildPNWP([MFGPN],0),[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy]

    FROM [NQL_RawData].[dbo].[wm_BulkImport] blkimp

    WHERE
       Manufacturer = 'MFG NAME' -- Your original import filter
    AND NOT EXISTS -- Prevent duplicate insertions
    ( 
    SELECT [MFGPN] 
    FROM [NQL_RawData].[dbo].[WM_MFGPNs] mfgpn
    WHERE blkimp.MFGPN = mfgpn.MFGPN
    )

Edit : OK, Your table has a Composite Primary Key (i.e. the combination of 2 or more fields comprises a unique key).

INSERT INTO [NQL_RawData].[dbo].[WM_MFGPNs]
    ([Manufacturer],[MPNWP],[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy])

    SELECT [Manufacturer],dbo.BuildPNWP([MFGPN],0),[MFGPN],[Cage],[Url],[DataSheetUrl],[Description],[Status],[NRND],[RoHS],[PbFree],[LOT],[LeadTime],[AddedOn],[AddedBy]

    FROM [NQL_RawData].[dbo].[wm_BulkImport] blkimp

    WHERE
       Manufacturer = 'MFG NAME' -- Your original import filter
    AND NOT EXISTS -- Prevent duplicate insertions
    ( 
    SELECT [MFGPN] 
    FROM [NQL_RawData].[dbo].[WM_MFGPNs] mfgpn
    WHERE blkimp.MFGPN = mfgpn.MFGPN
          AND blkimp.Manufacturer = mfgpn.Manufacturer
    )

Upvotes: 2

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