Return NULL Values In SELECT Statement With INNER JOIN ?
May 16, 2005
If I try to run the code below, and even one of the values in the INNER
JOIN statements is NULL, the DataReader ends up with zero rows.
What I need is to see the results even if one or more of INNER JOIN
statements has a NULL value. For example, if I want info on
asset# 2104, and there's no value in the DriverID field, I need the
rest of the data to display and just have the lblDriverName by
blank. Is that possible?
<code>
Sub BindSearchGrid()
Dim searchUnitID As String
Dim searchQuery As String
searchUnitID = tbSearchUnitID.Text
lblIDNum.Text = searchUnitID
searchQuery = "SELECT * FROM Assets " & _
"INNER JOIN Condition ON Condition.ConditionID = Assets.ConditionID " & _
"INNER JOIN Drivers ON Drivers.DriverID = Assets.DriverID " & _
"INNER JOIN Departments ON Departments.DepartmentID = Assets.DepartmentID " & _
"INNER JOIN AssetCategories
ON AssetCategories.AssetCategoryID = Assets.AssetCategoryID " & _
"INNER JOIN Store ON
Store.[Store ID] = Assets.StoreID WHERE RTRIM(Assets.[Unit ID]) = '"
& searchUnitID & "'"
Dim myReader As SqlDataReader
myReader = Data.queryDB(searchQuery)
While myReader.Read
If
Not IsDBNull(myReader("Store Name")) Then lblStrID.Text =
myReader("Store Name")
If
Not IsDBNull(myReader("AssetCategory")) Then lblAsstCat.Text =
myReader("AssetCategory")
If
Not IsDBNull(myReader("Condition Description")) Then lblCondID.Text =
myReader("Condition Description")
If
Not IsDBNull(myReader("DepartmentName")) Then lblDepID.Text =
myReader("DepartmentName")
If
Not IsDBNull(myReader("Unit ID")) Then lblUnID.Text = myReader("Unit
ID")
If
Not IsDBNull(myReader("Year")) Then lblYr.Text = myReader("Year")
If
Not IsDBNull(myReader("Make")) Then lblMk.Text = myReader("Make")
If
Not IsDBNull(myReader("Model")) Then lblMod.Text = myReader("Model")
If
Not IsDBNull(myReader("Mileage")) Then lblMile.Text =
myReader("Mileage")
If
Not IsDBNull(myReader("Vin Number")) Then lblVinNum.Text =
myReader("Vin Number")
If
Not IsDBNull(myReader("License Number")) Then lblLicNum.Text =
myReader("License Number")
If
Not IsDBNull(myReader("Name")) Then lblDriverName.Text =
myReader("Name")
If
Not IsDBNull(myReader("DateAcquired")) Then lblDateAcq.Text =
myReader("DateAcquired")
If
Not IsDBNull(myReader("DateSold")) Then lblDtSld.Text =
myReader("DateSold")
If
Not IsDBNull(myReader("PurchasePrice")) Then lblPrPrice.Text =
myReader("PurchasePrice")
If
Not IsDBNull(myReader("NextSchedMaint")) Then lblNSM.Text =
myReader("NextSchedMaint")
If
Not IsDBNull(myReader("GVWR")) Then lblGrVWR.Text = myReader("GVWR")
If
Not IsDBNull(myReader("GVW")) Then lblGrVW.Text = myReader("GVW")
If
Not IsDBNull(myReader("Crane Capacity")) Then lblCrCap.Text =
myReader("Crane Capacity")
If
Not IsDBNull(myReader("Crane Certification")) Then lblCrCert.Text =
myReader("Crane Certification")
If
Not IsDBNull(myReader("Repair Cost")) Then lblRepCost.Text =
myReader("Repair Cost")
If
Not IsDBNull(myReader("Estimate Replacement")) Then lblEstRep.Text =
myReader("Estimate Replacement")
If
Not IsDBNull(myReader("SalvageValue")) Then lblSalVal.Text =
myReader("SalvageValue")
If
Not IsDBNull(myReader("CurrentValue")) Then lblCurVal.Text =
myReader("CurrentValue")
If
Not IsDBNull(myReader("Comments")) Then lblCom.Text =
myReader("Comments")
If
Not IsDBNull(myReader("Description")) Then lblDesc.Text =
myReader("Description")
The Orders table contains orders placed on all the dates. I want to obtain a list of orders for a particular date, if there is no order for a product on the requested date, I want to return null values for the Quantity and Price fields.
I tried the following select statement:
select Products.ProductName, Orders.Quantity, Orders.Price from Products left join Orders on Products.ProductID = Orders.ProductID where Orders.OrderDate = '10/16/2004'
Where, there are a total of three products (A,B,C) in table Products. Product-C has no order on 10/16/2004, but I want it to return :
I have this INNER JOIN that is fine to show all possible combinations. But I need to show only rows that have one or more Null values in tbIntersect.
Should I use nested LEFT JOINT? How?
This is the SQL statement: sSQL = "SELECT DISTINCT tbCar100.Car100_ID, tbCar100.Description100 AS [Caractéristique 100], " & _ "tbCar200.Car200_ID, tbCar200.Description200 AS [Caractéristique 200], " & _ "tbCar300.Car300_ID, tbCar300.Description300 AS [Caractéristique 300], " & _ "tbCar400.Car400_ID, tbCar400.Description400 AS [Caractéristique 400], " & _ "tbCar500.Car500_ID, tbCar500.Description500 AS [Caractéristique 500], " & _ "tbCar600.Car600_ID, tbCar600.Description600 AS [Caractéristique 600], " & _ "tbCar700.Car700_ID, tbCar700.Description700 AS [Caractéristique 700], " & _ "tbProducts.Prod_ID, tbProducts.PartNumber AS [Part Number] , tbProducts.Description AS [Description] , tbProducts.DateAdded AS [Date] " & _ "FROM tbProducts INNER JOIN (tbCar700 INNER JOIN (tbCar600 INNER JOIN (tbCar500 INNER JOIN (tbCar400 INNER JOIN (tbCar300 INNER JOIN (tbCar100 INNER JOIN " & _ "(tbCar200 INNER JOIN tbIntersect ON tbCar200.Car200_ID = tbIntersect.Car200_ID) " & _ "ON tbCar100.Car100_ID = tbIntersect.Car100_ID) ON tbCar300.Car300_ID = tbIntersect.Car300_ID) ON tbCar400.Car400_ID = tbIntersect.Car400_ID) ON tbCar500.Car500_ID = tbIntersect.Car500_ID) ON tbCar600.Car600_ID = tbIntersect.Car600_ID) ON tbCar700.Car700_ID = tbIntersect.Car700_ID) ON tbProducts.Prod_ID = tbIntersect.Prod_ID " & _ ";"
Here is the content of the tbIntersect table: Car100_ID Car200_ID Car300_ID Car400_ID Car500_ID Car600_ID Car700_ID Prod_ID ID 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 19 1 3 1 1 1 1 1 20
I need to return the rows that have null data, ex: second row because Prod_ID is NULL and third row because Car300_ID is NULL. In fact I need the data from the other joint tables that correspond to these ID fields.
Ok I have a query "SELECT ColumnNames FROM tbl1" let's say the values returned are "age,sex,race".
Now I want to be able to create an "update" statement like "UPATE tbl2 SET Col2 = age + sex + race" dynamically and execute this UPDATE statement. So, if the next select statement returns "age, sex, race, gender" then the script should create "UPDATE tbl2 SET Col2 = age + sex + race + gender" and execute it.
Hi. I have an sql table which contains a number and a name. I would like to create a select statement that will display these two fields in the format : "number | name", but if there is a null value in the number it will display only the name and vice versa. How can I do it ? Any help is appreciated.
Hello all, I have been working with a DetailsView control for the past week and it is a great control, but also lacks on some departments. Anyhow I need to know what the best approach for this scenerio would be? I have a SqlDataSource" <asp:SqlDataSource ID="SqlUpsertAffiliateDetails" runat="server" ConnectionString="<%$ ConnectionStrings:connectionstring %>" SelectCommand="SELECT am.affiliate_id AS AffiliateId, am.member_id AS MemberId, m.First_Name, m.Last_Name, am.category_id AS CategoryId, ac.category_name, am.profile_web_address AS WebAddress, am.profile_email_1 AS Email, am.comments AS Comments, am.date_modified FROM tAffiliateMaster AS am WITH (NOLOCK) INNER JOIN tAffiliateCategories AS ac WITH (NOLOCK) ON am.category_id = ac.category_id INNER JOIN rapdata..Member AS m WITH (NOLOCK) ON am.member_id = m.Member_Number WHERE (am.affiliate_id = @AffiliateId)" UpdateCommand="spUpsertAffiliateProfile" UpdateCommandType="StoredProcedure"> <SelectParameters> <asp:QueryStringParameter Name="AffiliateId" QueryStringField="affiliate_id" /> </SelectParameters> <UpdateParameters> <asp:Parameter Name="Action" Type="Byte" DefaultValue="2" /> </UpdateParameters> </asp:SqlDataSource> And my SP:/* 09-19-07 Used to update affiliate profile */
CREATE PROCEDURE spUpsertAffiliateProfile @Action tinyint, @AffiliateId int, @MemberId int = -1, @CategoryId int, @WebAddress varchar(50), @Email varchar(50), @Comments varchar(1500) AS
SET NOCOUNT ON
-- Find errors first, check is not needed if deleting IF @Action <> 3 IF NOT EXISTS (SELECT Member_Number FROM rapdata..Member_Association WHERE Member_Number = @MemberId AND Status = 'A' AND Association_ID = 'TRI' AND Bill_Type_Code LIKE '%AF%') BEGIN SELECT retval = 'A qualified member ID was NOT found. Action Failed.', errorcount = 1, 0 AS affiliate_id RETURN END IF @Action = 1 IF EXISTS (SELECT member_id FROM tAffiliateMaster WHERE member_id = @MemberId) BEGIN SELECT retval = 'This member has already been listed. Action Failed.', errorcount = 1, 0 AS affiliate_id RETURN END
IF @Action = 1 AND @AffiliateId = 0-- insert BEGIN INSERT INTO tAffiliateMaster (member_id, category_id, profile_web_address, profile_email_1, comments) VALUES (@MemberId, @CategoryId, @WebAddress, @Email, @Comments)
SELECT retval = 'Record Entered', errorcount = 0, @@IDENTITY AS affiliate_id RETURN END
ELSE IF @Action = 2 AND @AffiliateId > 0-- update BEGIN UPDATE tAffiliateMaster
SET category_id= @CategoryId, profile_web_address=@WebAddress, profile_email_1=@Email, comments=@Comments
WHERE affiliate_id = @AffiliateId AND member_id = @MemberId
SELECT retval = 'Record Updated', errorcount = 0, @AffiliateId AS affiliate_id RETURN END
ELSE IF @Action = 3 AND @AffiliateId > 0-- delete BEGIN DELETE tAffiliateMaster
WHERE affiliate_id = @AffiliateId
SELECT retval = 'Record Deleted', errorcount = 0, 0 AS affiliate_id RETURN END GO
My question is how will I be able to return the retval? Will I need to do it within the code behind of the SqlDataSource Updated Event? Thanks!
So, really the key is the PROJID & the ACTIVITY_NAME (really, there's a unique column ID, but for this question, I'll leave it at that).
(Though this should be much easier to accomplish in code, the system is not built that way so) Is there a good way that I could return a status for a given PROJID based on whether a row exists for a given PROJID). In other words, ultimately, I would like to return something like this:
where the activity order (in this case) is Prepro, QA, Delivery. So because a Delivery row exists for PROJID 2, then the LAST_ACTIVITY would return "Delivery" and because only Prepro exists for PROJID 1, the LAST_ACTIVITY returned would be Prepro
I have a stored procedure with a SELECT statement, that retrieves 1 row. SELECT name FROM tblNames WHERE nameID = "1" I want all the NULL values in that row to be change in some default values. How do I do this?
I wrote a select statement, I only want to see orders with max lastUpdatedOn date of 14 days and older. Now my results show dates with all orders of 14 days and older (which is OK), but all others are displayed in the "Uitgifte" column as "NULL". But those orders should not be displayed at all.
selectdistinct ProductionHeader.ProdHeaderOrdNr, ProductionHeader.PartCode, ProductionHeader.Description, ProductionHeader.Qty, (select max (ProdStatusLog.ProdStatusCode)
I have a stored procedure that selects the unique Name of an item from one table.
SELECT DISTINCT ChainName from Chains
For each ChainName, there exists 0 or more StoreNames in the Stores. I want to return the result of this select as the second field in each row of the result set.
SELECT DISTINCT StoreName FROM Stores WHERE Stores.ChainName = ChainName
Each row of the result set returned by the stored procedure would contain:
ChainName, Array of StoreNames (or comma separated strings or whatever)
I am trying to return all the names of employees and their managers
this query returns all the employees except for 1
SELECT E.FNAME,E.LNAME,M.FNAME,M.LNAME FROM EMPLOYEE E,EMPLOYEE M WHERE E.SUPERSSN=M.SSN
the one that isn't returned has a null SUPERSSN, but when I add in:
OR E.SUPERSSN IS NULL
it returns a row with the name of the employee whose SUPERSSN is null 8 times (where each time the M.FNAME,M.LNAME are other employee names)
How do I ammend the first query to return each employee and their respective manager once, the employee without a manager having null values for the manager name columns?
I'm creating a 'dynamic where clause' with 15 parameters. I was using coalesce with the example below and it's working fine until it encounters a null value. I was trying to use nullif with coalesce to no avail. Can someone show me based on my example below how I can incorporate nullif with coalesce. Thanks in advance for you help.
Code Block WHERE cs.DirID = Coalesce(@DirNum, cs.DirID)
I need a bit of help with a join. I have 2 tables :
TradeSummary has fields : SymbolID, CurrentPrice, TotalValue
Trades has fields : SymbolID, TradeID, ExecutionTime, TradeValue
TradeSummary has one entry for each SymbolID, while Trades contains one or more entries per SymbolID
and what I want to retreive is :
For every item in TradeSummary get CurrentPrice, TotalValue from TradeSummary and also get TradeValue from Trades for the record for max(ExecutionTime) tables are joined on TradeSummary.SymbolID = Trades.SymbolID
Every attempt of mine so far returns multiple rows for each SymbolID - I want only one row per SymbolID
The 2nd table is for storing product codes for customers, in other words, one product can have different ProductCode for different customers. But some customers do not have ProductCode for a ProductID.
I want to create a query to return all the Products and its ProductCode (null is valid) for a specific customer.
I tried:
SELECT dbo.tblProductCodes.ProductCode, dbo.tblProductCodes.CustomerID, dbo.tblProducts.ProductName, dbo.tblProducts.ProductID FROM dbo.tblProducts LEFT OUTER JOIN dbo.tblProductCodes ON dbo.tblProducts.ProductID = dbo.tblProductCodes.ProductID WHERE dbo.tblProductCodes.CustomerID = 2
But the query left out all products that does not have ProductCode value in tblProductCodes table for CustomerID = 2. I want all the ProductName returned from query and render null or empty string for ProductCode value if the code does not exist in tblProductCodes table for the customer.
Hi all My query has some inner joins to some tables. And problem is when any ON clause get null as value, the correspondent record is not displayed. SELECTTableA.A, TableB.AFROM TableAINNER JOIN TableB ON TableA.A = TableB.A What I did try: SELECTTableA.A, TableB.AFROM TableAINNER JOIN TableB ON TableA.A = TableB.A OR TableA.A IS NULL (but It generates redundant values from TableB) I need to show all values even that value from Tablea is null Thank a lot for any help
I have tables and a function as representated by the code below. The names for objects here are just for representation and not the actual names of objects. Table RDTEST may have one or multiple values for RD for each PID. So the function GIVERD will return one or multiple values of RD for each value of PID passed to it.
When I run the following query, I get the required result except the rows for CID 500 for which PID is NULL in table T1. I want the rows for CID 500 as well with PID values as NULL.
SELECT A.CID, A.ANI, A.PID, B.RD FROM T1 AS A CROSS APPLY GIVERD(A.PID) B
Using TSQL, I have a table that holds filenames of Pictures for products. Different products can be using the same picture. I need to select the filenames for a single product only if it does not exists for a different product.I have tried Where Exists (select FileName From Tbl where
Prod_Id = @var) AND NOT EXISTS(select FileName From Tbl where Prod_Id != @var) In the Select Statement.
SELECT NAME, CASE WHEN PHONE IS NULL THEN '-' ELSE PHONE END AS PHONE FROM PATIENT WHERE PHONE = '-'
If I am switching the NULL values to hyphens (-), why am I not getting any records when I look for hyphens in the WHERE clause? The script is not as simple as this or else I would just check for NULL values. I really need to switch NULL values to something I can pass on to a variable and query on it from Reporting Services.
Hello,Thanks for helping me with this... I really appreciate it.I have a table called tblPatientDemographics with a number of columns.I would like to count the number of NULL values per record within mytable.tblPatientDemographicsPatientID Age Weight Height Race1234567 20 155 <NULL> Caucasian8912345 21 <NULL> <NULL> <NULL>In the first example above I want to display '1'In the second example above I want to display '3'Any help would be very much appreciated.Thanks !Chad*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
I am new to SQL and I am trouble-shooting a problem with a home-grown app someone else wrote using PERL. It has a web interface with names of boards. I found the program where i need to add the board names into and did that. The new board names show up in the drop-down list in the Web page for the app. Alerts are sent to the new board names and show up on the new boards. Users are granted access to the new boards and they can clear items off the new boards. Yet when i try to use a report function for the new boards i added, nothing is returned. I even ran a simple SQl select statement specifying the new board names and nothing is returned. The older board names, some of which i added myself, return values. I don't know what is going on. Any help is appreciated.
I need to access a table and return 3 values from it in the samerecordset - ie one iteration of the recordset will have 3 values fromthe same database, I have looked at sub queries but they dont seem tobe able to do what i want.I would be grateful for any guidanceS
set @bcpcommand = 'bcp "select med + replicate('' '',10-datalength(med)),ml+ replicate('' '',20-datalength(ml)),iname + replicate('' '',10-datalength(iname)) from copy_tbl" queryout "'+ @filename + '" -U -P -c'
exec master..xp_cmdshell @bcpCommand
Some of the values in the select statement are Null values and are getting skipped in the text file .My output looks like At A02 At1E AtE A03 At2E c100 c1230 I want them to allign but the third row has a null in the middle so it skips it and put the third value in the seconds place
I use the merge statement in a sproc to insert, update and delete records from a staging table to a production table.
In the long sql, here is a part of it,
When Matched and
((Student.SchoolID <> esis.SchoolID OR Student.GradeLevel <> esis.GradeLevel OR Student.LegalName <> esis.LegalName OR Student.WithdrawDate <> esis.WithdrawDate Student.SPEDFlag <> esis.SPEDFlag OR Student.MailingAddress <> esis.MailingAddress)
Then update
Set Student.Schoolid=esis.schoolid, .....
My question is how about if the column has null values in it.for example
if schoolID is null in production table is null, but in staging table is not null, will the <> return true.or if either side of <> has a null value, will it return true.
I don't want it to omit some records and causing the students records not get updated.If not return true, how to fix this?
I am working on some data that is JOINing to another table. Not a big thing. In the child table, there are different values for a single ID. I want to be able to select the Max ColorID that is Not Null, for each distinct CarID. The CarID is what I am joining the other table with. I need selecting the distinct row with the Max ColorID that is not Null. All this data is made up, so nothing looks logical in the design.
DECLARE @ColorList TABLE ( CarID float , ColorID int ) INSERT INTO @ColorList SELECT 1.55948815793043E+15, 9 UNION ALL SELECT 1.55948815793043E+15, 27 UNION ALL
I use a parameter for product type in my report so that end user can select different product types from a drop down menu. Now my problem is that for some fields product type is blank(NULL). But end user can not see these NULL value when he click drop down menu. I can not use Allow Null value option in report paramter , because I have used multi value option. Is there any other way to select these NULL values?
We are just upgrading a server from 2000 to 2005 and we are getting the message below when we execute a sql statement against a table with a date field with null values:
"Error converting data type DBTYPE_DBTIMESTAMP to datetime."
I have a little problem here. I need to select data from multiple columns and multiple tables, some of those columns can have NULL value. I have tried few things, and havent find the right way so far. Problem that i am incountering is that when i run SELECT statment as it is right now, i dont get back results which match search parameters but have NULL value in one or more column in select statment. How can i fix this problem?
