Hi,
How do I write a query where if a column, "value," is NULL I return
the 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 query
SELECT value FROM meta_data
Thanks, - 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.
TIA
Nick
Hi All,
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.
TIA
URW
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
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.
Can anyone suggest a way for me to do the above?
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)
AND DR.languageid = isnull(@inlanguageid,null)
AND DR.[ID]= @ID
)
go
set ansi_nulls on
I have a website and database in Access, how do i set it up so i can test it in IIS using SQL server?
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Thanks,
laura
hello everyone i was hoping to get some help.
i have sql server2000 and iis5.1 running and im using vbscript through asp.
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I want to run remote procs from a local - central proc, but don't want to crash my proc if the remote NT Server or SQL Server is not available.
So, I want to test for NT and SQL availability first.
Here's my code.
====================
DECLARE
@DBName varchar(22),
@QueryString NVARCHAR(130),
@Resultsint,
@ResultsTxtvarchar(31)
/* I find the server-dbasename name in a lookup table, and then build dynamic script */
SELECT @DBName = "<SRVRNAME~DBASENAME>"
SELECT @QueryString = N'master..xp_cmdshell "ECHO >'
+ SUBSTRING(@DBName, 1,6)
+ 'pipesqlquery", no_output'
EXEC @Results = sp_executesql @QueryString
SELECT @Results /* <-- testing here.... */
=====================
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If I test in QA, I get the expected "@Results" values.
If I run the proc, I get "@Results" = 0 for both events, and them my proc fails on the remote proc call if the NT / SQL is NOT running.
I don't know how to write DMO in TSQL to try that.
I have also tried using 'odbcping' too.
HINTS? Better way to test remote NT / SQL is NOT running?
Thanks in advance.
Hi,
Is there anyway to test the loadtesting/Stress testing on SQLSERVER. I wanted to executes a Store procedure with concurrent users.
Thanks
JK
Anyone have a tool or script to run to test a SQL server under heavy stress?
View 1 Replies View RelatedHi,
I need help to test person's skills for
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Thank you
Alex
i have performed all the steps for the replication there are two problems i encounytring
(i) how to check whether the replication is working or not
(ii) can replication on the subscribing server automatically create the table which publishing server is publshing
(iii)please tell me someother forums for sql server
what my knowledge says that in replication if i modify the data at one place it should automatically be modified in the subscribing server but this thing is also not happening (its not flashing any error message as such)
please tell me what all things i need to do to make sure that everything starts working
waiting for reply
ashish bhatnagar
Hi Guyz ,
I'm new to this forum and as well as new to OLAP testing . I would like to know OLAP testing and guidance for SQL server anlaysis services .
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Has anyone ever heard of using Response.Write to test sql queries in the query designer? Here is the actual suggestion I was given recently:
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Regards
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Hello Everyone
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hi every one
can any one please explain me how to test manually SSIS packages
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In my report i have CNAME parameter , which allows null value. I checked Allow null value check box in report parameter properties.
when i preview the report , it displays checked NULL check box beside CNAME parameter . I want to give some meaningful name(i.e.ALLCustomers) to this checkbox instead of NULL.
Is it possible through SSRS designer?
I have a flat file with the following columns
SampleID Rep_Number Product Protein Fat Solids
In the flat file SampleID and Product are populated in the first row only, rest of the rows only have values for Rep_Number, Protein, Fat, Solids.
SampleID and Product are blank for the rest of the rows. So my task is to fill those blank rows with the first row that has the sampleID and Product and load into the table.
Hi
I’ve got a simple SQLdataSource which is wired up to a gridView. When the page loads, it’s sometimes likely the data source would contain no data – how can I test for that in the code behind (no data)? I’d like to only show a button if there is data?
I’m using ASP.NET 2.0 with C#
Many thanksRichard
Hi
I really need your help. I’ve got a table with 4 columns – username (a string of text), dateTime (a date and time), duration (time in minutes), roomID (URL). I really need some help with writing up some code behind to check if a user has permission to continue. I’ve got the first bit, but I need help with collecting the data and testing it:
SqlConnection conn = new SqlConnection(Global.ConnectionString); SqlCommand cmd = new SqlCommand("select * from tblActiveSession where Username=@Username", conn);
SqlParameter paraUsername = cmd.Parameters.Add("@Username", SqlDbType.NVarChar); paraUsername.Value = this.txtUsername.Text;
try { conn.Open()
This is where I need the help. What I need is to test each row against the following:
If now() is within the allowed time frame – greater than dateTime, but less than dateTime + duration, then break the loop and redirect to roomID.
I really hope this makes sence, and I’m greatful for any help.
Many thanksRichard
Pop quiz hotshots:
I am creating a View in SQL2000 where i concatenate values from multiple tables. My problem is that if one of the values is null then the whole string is null, so I would like to know how to test for nulls within the Select part if the View.
Select
Titles.Title + ' ' + User.Forename + ' ' + User.Surname AS FullName,
For example;
If User.Forename is null, I still want to return Titles.Title and User.Surname as a concatenated string.
I’ve tried I few things like places if statements within the Select part but I can’t get it to work.
Many thanks