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Editorial Team
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Asked: 2026-06-18T00:59:57+00:00

I was trying to extract some info from the database using this query, SELECT

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I was trying to extract some info from the database using this query,

SELECT dbo.AfterHoursParameterSetup.Customer_id
, dbo.tblCustomer.Company
, dbo.tblDevices.device_id
, dbo.AfterHoursParameterSetup.DeviceMasterID
, dbo.tblDriverType.DriverType
, dbo.tblGroups.GroupName
, dbo.AfterHoursParameterSetup.ReportBy
, dbo.AfterHoursParameterSetup.TripTimeFilter
, dbo.AfterHoursParameterSetup.chkWeekEndTravel
, dbo.AfterHoursParameterSetup.WeekdayStart
, dbo.AfterHoursParameterSetup.WeekDayEnd
, dbo.AfterHoursParameterSetup.WeekEndFrom
, dbo.AfterHoursParameterSetup.WeekEndTo
, dbo.AfterHoursParameterSetup.ReportType
FROM dbo.AfterHoursParameterSetup
FULL JOIN dbo.tblCustomer
ON dbo.AfterHoursParameterSetup.Customer_id = dbo.tblCustomer.Customer_id
FULL JOIN dbo.tblDriverType
ON dbo.AfterHoursParameterSetup.DeviceMasterID = dbo.tblDriverType.DriverType_id
FULL JOIN dbo.tblGroups
ON dbo.AfterHoursParameterSetup.DeviceMasterID = dbo.tblGroups.Group_id
FULL JOIN dbo.tblDevices
ON dbo.AfterHoursParameterSetup.DeviceMasterID = dbo.tblDevices.device_id
ORDER BY dbo.AfterHoursParameterSetup.Customer_id ASC

Is there another way to structure this query so that I can eliminate the NULL values? dbo.AfterHoursParameterSetup.DeviceMasterID links everything together, but that column uses values from three different tables, so where there is no matching value, it returns NULL for all of the other columns selected where no matching join value was present.

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1 Answer

  1. Editorial Team

    If I understand your question, you want intersection of tables. If so user inner join.

    SELECT dbo.AfterHoursParameterSetup.Customer_id
    , dbo.tblCustomer.Company
    , dbo.tblDevices.device_id
    , dbo.AfterHoursParameterSetup.DeviceMasterID
    , dbo.tblDriverType.DriverType
    , dbo.tblGroups.GroupName
    , dbo.AfterHoursParameterSetup.ReportBy
    , dbo.AfterHoursParameterSetup.TripTimeFilter
    , dbo.AfterHoursParameterSetup.chkWeekEndTravel
    , dbo.AfterHoursParameterSetup.WeekdayStart
    , dbo.AfterHoursParameterSetup.WeekDayEnd
    , dbo.AfterHoursParameterSetup.WeekEndFrom
    , dbo.AfterHoursParameterSetup.WeekEndTo
    , dbo.AfterHoursParameterSetup.ReportType
FROM dbo.AfterHoursParameterSetup 
    INNER JOIN dbo.tblCustomer ON dbo.AfterHoursParameterSetup.Customer_id = dbo.tblCustomer.Customer_id
    INNER JOIN dbo.tblDriverType ON dbo.AfterHoursParameterSetup.DeviceMasterID = dbo.tblDriverType.DriverType_id
    INNER JOIN dbo.tblGroups ON dbo.AfterHoursParameterSetup.DeviceMasterID = dbo.tblGroups.Group_id
    INNER JOIN dbo.tblDevices ON dbo.AfterHoursParameterSetup.DeviceMasterID = dbo.tblDevices.device_id
ORDER BY dbo.AfterHoursParameterSetup.Customer_id ASC
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