I am obviously a newbie to SQL Server but have been using Access for years and I have come up against what appears to be an age old issue concerning nulls and specifically the functions to test for them etc.
Below is the Access Query I am having difficulty with...
----------------------------------------------------------
SELECT DISTINCT Max(tbl_ScheduleDate.SchDate) AS CurrentDate, ([SchDate],"mmmm yyyy") AS MonthYear, tbl_Schedule.Area, tbl_Schedule.CP, IIf(IsNull(tbl_tmp_CP.CPID),"Not Uploaded","Uploaded") AS Loaded
FROM (tbl_Schedule INNER JOIN tbl_ScheduleDate ON tbl_Schedule.MaxMinID = tbl_ScheduleDate.MaxMinID) LEFT JOIN tbl_tmp_CP ON tbl_Schedule.CP = tbl_tmp_CP.CP
GROUP BY Format([SchDate],"mmmm yyyy"), tbl_Schedule.Area, tbl_Schedule.CP, IIf(IsNull(tbl_tmp_CP.CPID),"Not Uploaded","Uploaded"), tbl_ScheduleDate.SchDate, tbl_tmp_CP.CPID;
-------------------------------------------------------------
Ignore the Format() function as I know this is a problem and have a fix.
The problem is this field...
IIf(IsNull(tbl_tmp_CP.CPID),"Not Uploaded","Uploaded") AS Loaded
I am testing to see if data is loaded into table 'tbl_tmp_CP' that is related to 'tbl_Schedule' by checking if there is a null value or not and then adding the right response string value to a column called Loaded.
Hi,How do I write a query where if a column, "value," is NULL I returnthe phrase "No value entered" but otherwise return the column's value,even if it is the empty string? I'm tried to modify this simple querySELECT value FROM meta_dataThanks, - Dave
I'm sure that I'm being stupid but this is driving me nuts. The case statements in the following query always return the ELSE and never return the THEN for the NULL.
Code:
select day(ums_users.created), count(*) as Total, SUM(CASE ums_user_info.info_key WHEN NULL THEN 1 ELSE 0 END) AS UnReg, SUM(CASE ums_user_info.info_key WHEN NULL THEN 0 ELSE 1 END) AS Reg from ums_users left join ums_user_map on ums_users.user_id = ums_user_map.user_id left join ums_groups on ums_user_map.group_id = ums_groups.group_id left join ums_user_info on ums_user_info.user_id = ums_users.user_id
where (ums_groups.group_id = '43A73FAE-0C2C-4ED8-BE1E-B32C12DB163D' or ums_groups.group_parent_id = '43A73FAE-0C2C-4ED8-BE1E-B32C12DB163D') AND year(ums_users.created) = '2005' and month(ums_users.created) = '01' GROUP BY day(ums_users.created) ORDER BY day(ums_users.created)
I'd be really grateful if somebody could explain what I'm doing wrong.
I need to find out how I can detect a NULL dataset at runtime. I have just released my first report using SQLServer Reporting services and all went well until I had an empty dataset on the server. There was no problem ever on my development system, running under Visual Studio 2005 Pro, even if I got no data back. Shortly after release to the server though I found that the report reported javascript errors. After a lot of searching I nailed it down to my code that alternated the background color of the rows in the report. The code looks like this:
=iif( RowNumber("DataRecords") Mod 2, "WhiteSmoke", "White")
I had this line in the BackGround property for my table row. It works great, unless DataRecords is Null and RowNumber is 0. I ended up taking the expression out, because I could not find a way to test if DataRecords was null or RowNumber was 0, without getting a compiler error.
Can anyone here tell me what I need to do so I can put that expression back in and alternate the color of my data rows again? I get the data using a stored procedure, if that matters.
Hi gang, When reading a record from my SQL database for display on a web form, I am checking for null before I assign the value to a TextBox on the form. Here is an example: // normal database setup code hereSqlDataReader rdr = cmd.ExecuteReader();if (!Convert.IsDBNull(rdr["FirstName"])){ txtFirstName.Text = (string)rdr["FirstName"];}// code here for other record fields Is this the correct way to do this? Is there a simpler way to do this? I am writing a bunch of database code and I want to do it right... Thanks,Kevin
Suppose I have added a xyz bit column in mytable. From now onwards new values inserted in mytable will have 0 or 1 in xyz column but the values that were previously stored will have NULL value in xyz column.
Now I want to write a query in which I will not give xyz parameter always like it can be null or value.
select * from mytable where class='something' and xyz is null
or
select * from mytable where class='something' and xyz = 1
hello everyone i was hoping to get some help. i have sql server2000 and iis5.1 running and im using vbscript through asp. i have a table that has two keys so that together they make a unique key. so i am trying to test my table in asp so that if there is a duplicate unique key inserted then show an error... Can anyone help me?
i've been informed that one way to test a query is to execute and roll-back it back as a transaction. my question is the following: using the aforementioned mechanism, how can i examine the database state before the query is rolled-back?
I am trying to improve the performance of a query. No matter how badit runs the first time, it runs really fast the second time.So how can I tell if I've done anything to improve the query if italways comes back quickly after the first run? I assume thequery/data/plan is in cache - how can I clean it out for my session?Thanks in advance for any help you can provide -
I have an application that is using ADO connection strings from multiple clients. One site with about 20 users was recently upgraded to a newer version of my application, and the number of connections to the SQL Server I'm told went from about 20 to spiking over 100 from time to time. There were myriad changes to my app over the course of the last year since their prior version of my app. I need to nail down which version introduced a change in connection pooling (?) and I was wondering what tools I should use to monitor that.
Hi,I have a query like this :SELECTx1,x2,( SELECT ... FROM ... WHERE ...UNIONSELECT ... FROM ... WHERE ...) as x3FROM ...WHERE ...The problem is that I don't want to return the results where x3 isNULL.Writing :SELECTx1,x2,( SELECT ... FROM ... WHERE ...UNIONSELECT ... FROM ... WHERE ...) as x3FROM ...WHERE ... AND x3 IS NOT NULLdoesn't work.The only solution I found is to write :SELECT * FROM((SELECTx1,x2,( SELECT ... FROM ... WHERE ...UNIONSELECT ... FROM ... WHERE ...) as x3FROM ...WHERE ...) AS R1)WHERE R1.x3 IS NOT NULLIs there a better solution? Can I use an EXISTS clause somewhere totest if x3 is null without having to have a 3rd SELECT statement?There's probably a very simple solution to do this, but I didn't findit.Thanks
Not sure if this is possible, but maybe. I have a table that contains a bunch of logs. I'm doing something like SELECT * FROM LOGS. The primary key in this table is LogID. I have another table that contains error messages. Each LogID could have multiple error messages associated with it. To get the error messages. When I perform my first select query listed above, I would like one of the columns to be populated with ALL the error messages for that particular LogID (SELECT * FROM ERRORS WHERE LogID = MyLogID). Any thoughts as to how I could accomplish such a daring feat?
i have the following query to sum the total due balance for a customer:
select sum(outstanding)from out where customer = 'myvariable' the problem is when the customer has no outstanding it returns NULL is there a way to return 0 when there are no outstanding?
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
The thing about the region is that it can be defined by states only, in which case CountyID and CityId are NULL, can be defined by Counties too, in which case only CityID is NULL or it can be defined up to City level, in which case all 3 are set to something. Example, Northeast would be all cities from northeast, but Pocono would be just some counties in PA, and so on...
The issue is now selecting all cities that belong into a region... Normally I would join the Zips table with the Region_Data table and retrieve all CityIDs... The issue is that, as I said, the CountyID and CityID might be null for some records, so I am not sure how to retrieve them?
I came up with one idea in which I create 3 temporary tables and I select in them all the records that have 1) only state, 2) only state and county, 3) all 3, then I join each and I union the results...
But I am wondering if there is a way to do the select in one shot?
Hello everybody, I have following datasource <asp:SqlDataSource ID="sqlIncidentTemplates" runat="server" ConnectionString="<%$ ConnectionStrings:Standard %>" SelectCommand="SELECT [IncidentText] FROM [IncidentTemplates] WHERE [ConstrAreaID] = @ConstrAreaID AND [ConstrDeviceID] = @ConstrDeviceID"> <SelectParameters> <asp:Parameter DefaultValue="" Name="ConstrAreaID" Type="Int32" ConvertEmptyStringToNull="true" /> <asp:Parameter DefaultValue="" Name="ConstrDeviceID" Type="int32" ConvertEmptyStringToNull="true" /> </SelectParameters> As far as I understand default select command should be "SELECT IncidentText FROM IncidentTemplates WHERE ConstrAreaID IS NULL AND ConstrDeviceID IS NULL". Unfortunately this is not the case. I assume that the "[ConstrAreaID] = @ConstrAreaID " is translated into "ConstrAreaID = NULL". Could this be the reason and how can I solve this problem? Thanks in advance
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.
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'd like to be able to offer the option of selecting a project by the ProjectID number, and if a projectID is not supplied then the default result set would be select * from tbl_Projects.
ALTER PROCEDURE [USP_SelectProject] -- Add the parameters for the stored procedure here @ProjectNumber as int AS BEGIN
Code Block SELECT [userID], CASE WHEN [mdlName] = NULL AND [mdnName] = NULL THEN [lstName] + ', ' + [fstName] WHEN [mdlName] <> NULL AND [mdnName] <> NULL THEN [lstName] + ', ' + [fstName] + ' ' + [mdlName] + ' ' + [mdnName] WHEN [mdlName] <> NULL AND [mdnName] = NULL THEN [lstName] + ', ' + [fstName] + ' ' + [mdlName] WHEN [mdnName] <> NULL AND [mdlName] = NULL THEN [lstName] + ', ' + [fstName] + ' ' + [mdnName] END AS [Full Name] FROM [grUser] ORDER BY [Full Name] ASC
The [Full Name] is always null. Any idea why? What I'm trying to do is if mdlName (middle name) and mdnName (maiden name) is null then display the lstName (last name) and fstName (first name) only and so on.
I have a stored procedure which accepts 3 arguments that are used in the WHERE clause of a SELECT Statement
CREATE PROCEDURE [dbo].[MyProcedure] @argYear INT, @argMonth INT, @argDay INT
AS
SELECT *
FROM MyData
WHERE MyData.Year = @argYear AND MyData.Month = @argMonth AND MyData.Day = @argDay
The problem that I am having is @argDay is an "optional" argument. If @argDay is NULL then I want to basically ignore the "AND MyData.Day = @argDay" condition.
Is there an easier way to do this than:
IF @argDay is NULL
SELECT *
FROM MyData
WHERE
MyData.Year = @argYear AND MyData.Month = @argMonthELSE
SELECT *
FROM MyData
WHERE
MyData.Year = @argYear AND MyData.Month = @argMonth AND MyData.Day = @argDay
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?
Hey. I need to substitute a value from a table if the input var is null. This is fine if the value coming from table is not null. But, it the table value is also null, it doesn't work. The problem I'm getting is in the isnull line which is in Dark green color because @inFileVersion is set to null explicitly and when the isnull function evaluates, value returned from DR.FileVersion is also null which is correct. I want the null=null to return true which is why i set ansi_nulls off. But it doesn't return anything. And the select statement should return something but in my case it returns null. If I comment the isnull statements in the where clause, everything works fine. Please tell me what am I doing wrong. Is it possible to do this without setting the ansi_nulls to off??? Thank you
set ansi_nulls off
go
declare
@inFileName VARCHAR (100),
@inFileSize INT,
@Id int,
@inlanguageid INT,
@inFileVersion VARCHAR (100),
@ExeState int
set @inFileName = 'A0006337.EXE'
set @inFileSize = 28796
set @Id= 1
set @inlanguageid =null
set @inFileVersion =NULL
set @ExeState =0
select Dr.StateID from table1 dR
where
DR.[FileName] = @inFileName
AND DR.FileSize =@inFileSize
AND DR.FileVersion = isnull(@inFileVersion,DR.FileVersion)
Hi there ; This Problem is goin to make me crazy! I've got a table with couple of fields, 2 of them are DateTime, in Sql Express 05 . I used asp.net 2.0 to insert datetime values, directly, using sth like DateTime.Now.ToString() . i use 2 selects as follows : 1)select * from X where Date1='8/9/2006 11:17:41 AM' 2)select * from X where Date2='8/9/2006 11:17:41 AM' #1 is OK, but the second one returns a row with all columns set to NULL . (X is the name of the table) Thanks in advance
Hi, how do i do a select statement with asp.net to return a record if a field is null. I have the following code: SqlCommand cmd = new SqlCommand("SELECT * FROM Categories WHERE ParentId = @ParentId", cn);.Parameters.Add("@ParentId", SqlDbType.Int).Value = parentId != null ? (object) parentId : DBNull.Value;cn.Open(); The variable parentId is a nullable int. However when i pass in a null value it doesn't return anything even though there are records in the database that have a null value for the ParentId field. Appreciate if someone could tell me what i am doing wrong. Thanks
The problem I'm having is described below all this code.---------------------------------------------------------My content page has a SqlDataSource: <asp:SqlDataSource ID="sqlGetUserInfo" runat="server" ConnectionString="<%$ ConnectionStrings:RemoteNotes_DataConnectionString %>" SelectCommand="SELECT [UserFirstName], [UserLastName] FROM [Users] WHERE ([UserGUID] = @UserGUID)" onselecting="sqlGetUserInfo_Selecting"> <SelectParameters> <asp:Parameter Name="UserGUID" Type="String" /> </SelectParameters> </asp:SqlDataSource> -----------------------------------------------------Inside my OnSelecting event, I have: protected void sqlGetUserInfo_Selecting(object sender, SqlDataSourceSelectingEventArgs e) { sqlGetUserInfo.SelectParameters["UserGUID"].DefaultValue = Membership.GetUser().ProviderUserKey.ToString(); } ---------------------------------------------------------------------And, inside my Page_Load, the relevant code is: //String strUserFirstName = ((DataView)sqlGetUserInfo.Select(DataSourceSelectArguments.Empty)).Table.Rows[0]["UserFirstName"].ToString(); DataView dvUserDetails = (DataView)sqlGetUserInfo.Select(DataSourceSelectArguments.Empty); if ((dvUserDetails != null) && (dvUserDetails.Count > 0)) { DataRow drUserInfo = dvUserDetails.Table.Rows[0]; lblHelloMessage.Text = "Hello, " + drUserInfo["UserFirstName"].ToString() + ((drUserInfo["UserLastName"].ToString() == "") ? "" : " " + drUserInfo["UserLastName"].ToString()); } ---------------------Now, here's the problem. My "if" statement is never executing because "dvUserDetails" is null. However, when I break the execution and put awatch on the actual Select() statement, it shows a DataView with the correct return rows! You can see the commented line where I tried tobypass the DataView thing (just as a test), but I get an object reference is null error.The weird thing is that it was working fine one minute, then started getting "funky" (working, then not, then working, then not), and now it just doesn't work at all. All thiswithout me changing one bit of my code because I was checking out some UI flow and stopping and restarting the application. I've tracked downthe temporary files directory the localhost web server runs from, deleted all those files, and cleaned my solution. I've even triedrebooting, and nothing seems to make it work again.My relevant specs are VS2008 9.0.21022.8 RTM on Vista Enterprise x64.
Hello,I'm a beginner in SQL and I have been searching through the SQL Cookbook and Google but I can't seem to find an example of what I want to do. I want to create a report that will return names and emails using two of my tables. I want to use the email in my primary table in the select but if it is null or empty I want to replace it with an email from my secondary table. Below is what I would like to do but I got a syntax error with it in SQL Server 2000. SELECT MemberID As ID, MemberFirstName As FirstName, MemberLastName As LastName, (IF MemberEmail = '' THEN SELECT TOP 1 OtherEmail FROM OtherTable WHERE OtherID = MemberID) As EmailFROM PrimaryTableThanks for your time.Jason
I used this statement, select * from table1 where date1 = null, in SQL Query window and got a few records back. Now, I used the same statement in my VB 5 code and no record is found. How do I select all the records in table1 which do not have values in field date1? Thanks for the help.
