In my database, in a few tables there are NULL values in some of the columns. This is okay, but I need to know how to query for nulls. For example I tried the following query but it did not work:
select * from Employee where DateOfBirth =NULL
This did not work so I also tried the following:
select * from Employee where DateOfBirth ='NULL'
Neither of these worked. Can someone help me out?
I would drop and add the table but the data can't be deleted. So if anyone could help with the statement it would be greatly appreciated. Thanks
View 7 Replies View RelatedWe have a case where in we should show date based on conditions for e.g if we had a column defined as
col varchar(10) then we would show col as 'NULL' for some condition and actual value when no condition
Normaly date values are stored here e.g under col 20150901 .
Case
when col>'20150901' then 'NULL'
else col
end as Derivedcol
Note this is an extract process and we are presenting data by pumping the data in a table .
Now there is another similar column -colz varchar(10) which stores date but doesnt have case condition so whenever date has no value its shows null which is database null.
So whats the difference between database null and string null ?
How can we show database null for the case condition instead of string "null"?
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
hi
here is sql of query when any of sub query return zero result the result become null though other may have some results
litke
(select * from t1)-(select * from t)
in this case if either of table return zero rows the result will be null
plz help
thnx
faisal iqbal
sELECT bet.Party_id, (((select sum(amount*rate) from bet where team=1 and kl='l' and matchid = 18 and Party_id=1 )*1)-((select sum(amount*rate) from bet where team=1 and kl='k' and matchid = 18 and Party_id=1 )*1)) AS Expr1, (select sum(amount*rate) from bet where team=2 and matchid = 18 and bet.Party_id=1) AS Expr2, (select sum(amount*rate) from bet where team=3 and matchid = 18 and bet.Party_id=1) AS Expr3
FROM bet
GROUP BY bet.Party_id;
Hi there, I'm kind of new with SQL and I need some help with a query I am Creating to pull records from date field whose defaul value is NULL. The query i have works in SQL but does not work in Crystal Reports any clue how?
View 1 Replies View RelatedHiI have a table called Orders with columns OrderId, ItemReceiptDate and itemnumber.Sample Data is given below:OrderID | ItemReceiptDate | ItemNumber-------------------------------------------1 | '2004-01-01' | 31 | '2004-01-28' | 41 | NULL | 52 | '2002-11-19' | 12 | '2003-01-28' | 4What I would like to SELECT is:OrderID | ItemReceiptDate | ItemNumber-------------------------------------------1 | NULL | 52 | '2003-01-28' | 4i.e. if ItemReceiptDate is null for a particular order id ==> return that recordelse return the record with maximum ItemReceiptDate.Please help.Thanks
View 8 Replies View Relatedhow can i write a SQL query that will pull all records that are equal to NULL??
View 1 Replies View RelatedHow do i retrieve 0 for null value in the following query
select customerid, count(*) from calls_new_today c, customerdnis cd where c.cpn=cd.dnis and cd.enddate is null
group by customerid
order by customerid
what i mean is when count(*) = 0 no value is returned i want a Zero in the output how do i get it?
How does the phrase "Is Not Null" in the where clause effect theeffectiveness of a query?If it is a determent to the effectiveness of the query, how do youwork around it?Thanks,
View 3 Replies View RelatedI'd like insert null value from a query but i can do it,if my query is :UPDATE table:name UPDATE euro='' WHERE id='5';i have a sybase message warning like this :Error converting data type varchar to numeric.Why ????
View 4 Replies View RelatedI am trying to have a query with the option for items to be null. (So users don't need to fill in the other fields if they choose not too) SELECT Tickets.TicketID, Tickets.UserID, Tickets.SystemID, Tickets.Title, Tickets.Description, Tickets.Software, Tickets.Date, Systems.OS, OS.OS AS OstitleFROM Tickets INNER JOIN Systems ON Tickets.SystemID = Systems.SystemID INNER JOIN OS ON Systems.OS = OS.osIDWHERE (Tickets.Title LIKE '%' + @title + '%') AND (Tickets.Software LIKE '%' + @software + '%') AND (Tickets.Description LIKE '%' + @descrip + '%') AND (Systems.OS = @osid) OR (@osid IS NULL)This works when i give the LIKE values % as a parameter. So they can choose to search by title + software but not description or description and nothing else etc etc etc. The problem is, the osid. If I give it a value it works but if i try to do null, *. or % it always displays every item in the databse ignoring any of the previous like statements. Anyone have an idea?
View 3 Replies View RelatedHello.
I have (2) related questions.
#1: I am using a paramterized query, but am unable to make it work if one of the values happens to be null.
if (Request.Form["txtLink1"] != "")
{
mySqlCmd.Parameters.Add(new SqlParameter("@link1",
SqlDbType.VarChar));
mySqlCmd.Parameters["@link1"].Value =
Request.Form["txtLink1"];
}
else
{
mySqlCmd.Parameters.Add(new SqlParameter("@link1",
SqlDbType.VarChar));
mySqlCmd.Parameters["@link1"].Value = null;
}
If txtLink1 happens to be empty, I want @link1 to enter null. The
column in the Sql Server allows for nulls, but I get an error message
that says no value was supplied. In short, how do I supply a null value
using a parameterized query?
#2: For debugging purposes, how can I view what my SQL string looks
like (with all the values entered) before it gets submitted to the
database? When I view the string, it still contains the placeholder
values (@link1) instead of the actual values.
Thanks in advance!
-Brenden
I know I am missing something basic, here.
I have a date field in a table. The field is 'allowed Nulls'. When a certain thing happens in the program, the date is filled in.
At various times, I need to do a query to find all the rows that have no dates entered.
What do I use in my where clause? SQL server does not like 'where date = null.'
Thanks,
Judith
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
Now how to write same query for both cases.
I have a grid with checkbox, where users can select multiple rows and edit at the same time and save it to the DB. Now I have used a Footer Template with textbox in the gridview. So if I want to put similar data's for some particular rows at the same time in the grid, I select the multiple rows and try to put values in the footer template textbox and when I click on save, it saves successfully.
UPDATE QUERY:
"UPDATE [Test] SET [Name]='" + Name + "',[Designation]= '" + Designation + "', [City]= '" + City + "' WHERE EmpID='" + EmpID + "'";
Now here is the challenge, but even when I enter null values in the footer template textbox it has to save with the old values of the rows and not null values. I tried it and couldn't make it happen. So anything like putting the case for each column and mentioning like if null accept the old value and not null accept new value.
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?
Hello,
I'm using the query wizard in VB.net to write a query for SQL CE. I want to replace null values with text. I expected the COALESCE function to do this but I get an error message saying its not a valid function. This is a sample.
Select COALESCE(table.Name,'No Name') as Name from table
Any help appreciated
Thanks
I have straight forward Insert Query, which takes values mainly from text boxes, however I am having trouble when the value is null.
eg
cmdP0.Parameters["@EmpID"].Value=txtEmpNo.Text;
When I run the Query I get...
Message="Parameterized Query '(@ID int,@EmpID int,@Photo nvarchar(260),@DoB smalldatetime,@Med' expects parameter @EmpID, which was not supplied."
I also get this when the parameter can be a string.
I have set the parameter properties so that SourceColumnNullMaping to true (it was set as false - so hoped this might fix it!)
No luck.
Hi Folx,
I am new to
SQL Server. I am rolling summed values from table profile to two columns in table txn. When the value for one (not necessarily both...) column is null, can that value be translated to zero? Or must I write a procedure or use a cursor?
Versions:
Microsoft SQL Server Integration Services Designer
Version 9.00.1399.00
Microsoft SQL Server Management Studio
9.00.1399.00
For example, when version_count for a particular transaction_id is null in the profile table but profile_count has summable integers, how do I update the version_count to zero in the same pass that I update the profile_count?
update txn
set
version_count =
(
select
sum(a.version_count)
from
profile a
where
a.transaction_id=txn.transaction_id
and
a.extraction_date=txn.extraction_date
and
txn.version_count is null
),
profile_count =
(
select
count(*)
from
profile a
where
a.transaction_id=txn.transaction_id
and
a.extraction_date=txn.extraction_date
and
txn.profile_count is null
)
Hello everyone,
i'm using an excel source where i get my excel rows using a query, I'd like to replace possible null values with some other data(a zero value or a empty string for example), that's because i'm performing a transformation into a sql server table wich doesn't accept null values for some columns.
Is there any function to convert a null value to another one? I used the sql server's CASE function, but it didn't work. Any suggestions?
thanks a lot.
I am considering not to allow null values in the database.
what are pros and cons ?
I am hoping someone could help me understand why this is happening and perhaps a solution.
I am using ASP.NET 2.0 with a SQL 2005 database.
In code behind, I am performing a query using a parameter as below:
sql = "SELECT field_name FROM myTable WHERE (field_name = @P1)"
objCommand.Parameters.Add(New SqlParameter("@P1", TextBox1.Text))
The parameter is obtained from TextBox1 which has valid input. However, the value is not in the table. The query should not return ANY results. However, I am getting one single row back with null values for each field requested in the query.
The SQL user account for this query has select, insert, and update permissions on the table. The query is simple, no joins, and the table has no null values in any fields. If I perform the exact same query using an account with select only permission on the table, I get what I was expecting, no records. Then if I go back to the previous user account with more permissioins, and I change the query to pass the paramter this way:
sql = String.Format("SELECT field_name FROM myTable WHERE (field_name = {0})", TextBox1.Text)
I also get NO records retuned using the same criteria.
What is going on here? I would prefer to use the parameterized query method with the account having elevated permissions. Is there some command object setting that can prevent the null row from returning?
Thanks!
HI
I have three different columns as email1,email2 , email3.I am concatinating these columns into one i.e EMail like
select ISNULL(dbo.tblperson.Email1, N'') + ';' + ISNULL(dbo.tblperson.Email2, N'') + ';' + ISNULL(dbo.tblperson.Email3, N'') AS Email from tablename.
One eg of the output of the above query when email2,email3 are having null values in the table is :
jacky_foo@mfa.gov.sg;;
means it is inserting semicoluns whenever there is a null value in the particular column. I want to remove this extra semicolumn whenever there is null value in the column.
Please let me know how can i do this
I know I am missing something basic, here.
I have a date field in a table. The field is 'allowed Nulls'. When a certain thing happens in the program, the date is filled in.
At various times, I need to do a query to find all the rows that have no dates entered.
What do I use in my where clause? SQL server does not like 'where date = null.'
Thanks,
Judith
I would like to populate a grid with data from 2 different tables.
Table1: [PK]id(int), name(nvarchar), areaID(int)
Table2: [PK][FK]areaID(int), areaDescription(nvarchar)
My cerrent query is:
SELECT Table1.id, Table1.name, Table2.areaDescription FROM Table1 INNER JOIN Table2 ON Table1.areaID = Table2.areaID
However, sometimes the areaID in Table1 will only be populated at a later stage and therefore will be NULL in Table1. Table2 is used as a lookup table when inserting into Table1. This query therefore ommits any records in Table1 which do not have an areaID. I would like to view ALL records(ones without an areaID as well) as they would be populated in the grid and selected to be updated on web forms because they are incomplete and then subsequently assigned an areaID.
Any help with this query would be much appreciated...
Hi,
I need help to build a query that shows me how many columns inside a range on columns are null.
Example: quantity1;quantity2;quantity3;quantity4;quantity5; quantity6;quantity7;
Which columns are null?
Thanks in advance
Can someone helo me to query a table and list all the columns and how many null records are there in each.
View 3 Replies View RelatedI have a problem I 'get stuck on it. i hope someone can help me.
I have a SQLServer table with an ID-field with a primary key and identity on it, and a couple of other fields with defaultvalue "" and NOT nullable
When i like to update an record in an formview of ASP 2.0 and fill in all fields everything is updated and everything goes fine
but
when I leave one field blank then I get the message 'can not enter null value in column X'
even when I place in the Updateparameter in my code
<asp:Parameter Name="Name" DefaultValue="" /> ASP tries to update an Null value
when i place an space as default value like
<asp:Parameter Name="Name" DefaultValue=" " />
everything goes fine exept there is an space in my database.
How can I update my record, and leave some textboxes emtpy AND where my fields are NOT nullable
I'm getting desparate of this.
make my fields nullable is not an option because this is a 'customerswish'
Please help
I closed my db connection and now I guess I'm supposed to set it to null...how do I do that? I've tried a few ways without success.
Thanks!
Jamie
I would like to know if it's possible to pass NULL value to the database. I want to update a column, a parameter has to be passed in to do so, i.e @value = '123'. but if there were no parameter value, i.e @value = '', I want to the value in the database to be NULL. I don't want to pass (''). can this be achieved?
View 5 Replies View RelatedHi
I want to know how do we store null in the database
i know Null is unkown value
but it has to be something so the SQL server can know its null ( computer only knows 0s and 1s )
is it pointers and null does not have a pointer?
or do we store something physically?
an example : we have string(varchar) column that has this value in it "Joey Tribbiani" that means in the hard disk we will see 14 bytes "Joey Tribbiani" in there, if we changed the value to "Monika" the 14 bytes will be replaced by 5 bytes "Monika", if we changed to empty strike then we will have 0 bytes ""
now if changed it to become NULL what is going to happen to the hard disk, what is going to be in there physically??
may anyone help me in this?
many thanks
hi guys. i'm using vb.net with vs 2003 and MSSQL Managment Studio Express as my database server.
i want to insert null value into database, so i use System.DBNull.Value
but it doesn't show NULL, but a empty field. I tried System.DBNull.Value.ToString, it gives me same result.
what can i do to have NULL in that field?
thanks for any advise, i would appreciate it very much.