NULL On Empty Fields

Mar 16, 2008

How can I make empty cells show NULL on my table? Some cells show NULL others won't. Does this mean that they have contents?

The reason being is that, when I use the code

Select *
From Employees
Where JobDescription1 Like '%montly%'

Those with empty jobdescription1 show with the legitimate results.

Any help please?


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Change Not Null To Null, Default Value To Empty

Aug 3, 2005

hi,my structure table in database:Amount float(53) not null default 0when i try to run his script:alter table ABC alter column Amount float(53) nullit can only set the Amount to allow null, but can't set the defaultvalue to empty.anyone know how to set the field to allow null and default set toempty, no value.thanks

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Empty &&<&&> IS NOT NULL

Jul 22, 2007


I have a query that returns the appropriate values I need, however there is one field I'd like to add and utilize but my problem is I only want to use it if it contains data.

If I filter it with IS NOT NULL it returns all the records, including the empty records. The field is simply empty, and doesn't come back as NULL. If I filter it with =' ' , it shows all the records with the empty records only.

I need to do the opposite, be able to filter it only if it's not empty.

Any help would be appreciated.

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Empty String To Null

Jul 11, 2001

create view v_GuestOrder
Select T1.id_Guest,T2.OrderName
from Guest T1
left join Order T2 T2.id_order = T1.Id_order

select * from v_GuestOrder
Id_Guest OrderName
-------- -----
1 spoon
2 phone
4 tv

I need something similar to

case orderName
when '' then Null -- Sql server gives error in thsi case
end as orderName
from v_GuestOrder

So I need to assign NULL to OrderName is query return empty string,
it will be treated by Crystal reports as Null

Please help , thanks

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COALESCE: Empty Instead Of NULL?

Mar 25, 2008

I've inherited a terribly designed database. When cells in the tables have nothing in them, rather than being NULL, they're just empty. So now I can't use COALESCE...

Is there a way for COALESCE to check if a cell is empty instead of NULL? And if not, is there a way to get around this?

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SSIS Converting To Date Empty Fields (no Values)

Jan 8, 2008

Hi, how do I convert dates with SSIS, when I receive dates I have no problem, with empty fields I have to go through a transformation as:

trim(field_name) == "" ? "999999" : substring....... (derive transform)

after this I have to update each field holding '999999' to NULL. (using sql task)

Is there an easier way to doing this?


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Checking If String Is NULL Or EMPTY In SQL

Nov 9, 2007

I need to check in my Stored procedure if the information passed is null or empty so I can decided to insert the new value or keep the old. How do I accomplish this please in T-SQL. Thanks in advance.

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Insert Empty String Or Null To Sql Db

Jan 12, 2008

Trying to insert null value into sql table, but not working, if I use:
 if (strMyText.Length == 0)        command.Parameters.Add("@Text", DBNull.Value); // or using:("@Text", null), or using:("@Text", DBNull) else         command.Parameters.AddWithValue("@Text", strMyText); 
When I go back to table, I see the value is: 'NULL', has single quotation mark, suppose to be: NULL
Where is the problem?
Thanks a lot.

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Null, Empty Strings, And Efficiency

Oct 12, 2004

************* Edited by moderator Adec ***************
Inserted missing < code></ code> tags. Always include such
tags when including code in your postings. Don't force the
moderators to do this for you. Many readers disregard
postings without the code tags.

Well met,

Let's say I have a web form that allows users to insert and update records in a SQL database. Is it better to set empty web controls (textbox, etc.) to DBNull or let it go as an empty string into the database?

Example code:

if (tboxNAME.Text == "")
sqlCommand1.Parameters["@NAME"].Value = DBNull.Value;
sqlCommand1.Parameters["@NAME"].Value = tboxNAME.Text;

Is the above overkill? It seems like it would be a good idea to set fields which the user empties back to Null rather than an empty string.



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Null Or Empty String Use More Space?

Aug 9, 2005

Hi all,   I have some columns in my database which allows null.  I want to know if leaving the field to be NULL or storing an empty string into the field, which will take up more space?? if the field type is varchar(100)

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HELP : Empty String To Null Conversion By SQL

Nov 10, 2005

Hi folks,

I've have about 100 tables, for some reasons, column values that are originally NULL was inserted as emtpy string. So, I am wondering if I can write JUST ONE SQL (hopefully don't have to specify the field names in the SQL as well) for each table so that all the empty strings will be converted back to NULL.


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Aug 13, 2015

I added a new field to an existing ETL process which uses SSIS to ingest a CSV file. The new field in the file, Call_Transaction_ID, will not always be populated for every record and so can be NULL or empty for certain records.

Here's the problem:After the file is extracted into a staging table, the Call_Transaction_ID field is showing blank or empty when it has no ID for that particular record. The problem is when I try to then ETL this data into a fact table - I'm trying to set the Call_Transaction_ID field to -1 if it is NULL or empty, however SQL Server doesn't see the field as empty even though there is no value in the field so -1 will NEVER return.

Using a WHERE DATALENGTH(Call_Transaction_ID) = 0 returns 0 records, again because SQL Server doesn't see the field as empty or NULL.

What do I do now to get around this? How do I fix it?

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Analysis :: Convert A Zero To Null Or Empty?

Sep 10, 2015

I am working on a cube and I want to hide the results of a calculation if it is zero.

It is an inventory problem based on a transaction pattern. (add plus one to the inventory, add minus one to the inventory).

The sum of those two is zero, but the cube get messed but by thousands of zero.

I found some solutions of displaying 0 for NULL but I want to dispaly NULL (or empty) for 0.

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Insert Query Fails (if Form Fields Left Empty)

Aug 13, 2007

Dear All,
I have created a table in my SQL server database, the problem i am facing is my insert query fails if i leave any form field empty (leave it blank). On my back-end table, only one field is mandatory, and others have been set with the constraint "allow null".
As per our business requirement, except one value is complusory while others are optional. If I enter all values in the form it works perfectly fine. Can you see in the code below - where am i possibly going wrong ?
<script language="VB" runat="server" >      Sub Page_Load(Src As Object, e As EventArgs)                      If Page.IsPostBack Then                        Dim ConLath As SqlConnection            Dim comLath As SqlCommand            Dim insertcmd                        conLath = New SqlConnection("Data Source=SQLas;Initial Catalog=settle;User ID=sa;Password=password")            ConLath.Open()            insertcmd = "Insert into His_set values (@t_d,@s_p,@p_s,@v_oq,@i_oq,@v_qn,@i_qn,@v_qw,@i_qw)"                        comLath = New SqlCommand(insertcmd, ConLath)                                    comLath.Parameters.Add(New SqlParameter("@t_d", SqlDbType.DateTime, 12))            comLath.Parameters("@t_d").Value = trade_date.Text            comLath.Parameters.Add(New SqlParameter("@s_p", SqlDbType.Decimal, 8))            comLath.Parameters("@s_p").Value = sett_price.Text            comLath.Parameters.Add(New SqlParameter("@p_s", SqlDbType.Decimal, 8))            comLath.Parameters("@p_s").Value = post_close.Text            comLath.Parameters.Add(New SqlParameter("@v_oq", SqlDbType.Int, 8))            comLath.Parameters("@v_oq").Value = vol_oq.Text            comLath.Parameters.Add(New SqlParameter("@i_oq", SqlDbType.Int, 8))            comLath.Parameters("@i_oq").Value = oi_oq.Text            comLath.Parameters.Add(New SqlParameter("@v_qn", SqlDbType.Int, 8))            comLath.Parameters("@v_qn").Value = vol_qn.Text            comLath.Parameters.Add(New SqlParameter("@v_qw", SqlDbType.Int, 8))            comLath.Parameters("@v_qw").Value = vol_qw.Text            comLath.Parameters.Add(New SqlParameter("@i_qn", SqlDbType.Int, 8))            comLath.Parameters("@i_qn").Value = oi_qn.Text            comLath.Parameters.Add(New SqlParameter("@i_qw", SqlDbType.Int, 8))            comLath.Parameters("@i_qw").Value = oi_qw.Text
                        Try                comLath.ExecuteNonQuery()                            Catch ex As SqlException                If ex.Number = 2627 Then                    Message.InnerHtml = "ERROR: A record already exists with " _                       & "the same primary key"                Else                    Message.InnerHtml = "ERROR: Could not add record, please " _                       & "ensure the fields are correctly filled out"                    Message.Style("color") = "red"                End If            End Try
            comLath.Dispose()            ConLath.Close()                                                        End If   End Sub

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Exported File In CSV Format, Empty Fields Are Producing A Space

Sep 20, 2007

Hello, I attempt to export a CSV formatted file from SSRS and if the field is not containing data, a space is added to the field.


4, ,1, , , ,

desired output:


I know it is just a property setting. If someone can instruct me on the correct setting to adjust, I would greatly appreciate your help!

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NULL Values Vs Empty String Vs Space

Oct 25, 2006

How do I define a field to have the default value = ''. Not NULL but not a space either in SQL Server 2005?

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Within A SELECT, How Do I Replace An Empty Or Null Value With A Value From Another Table?

Apr 20, 2008

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  

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T-SQL (SS2K8) :: Check If Variable Is Empty Or Null?

Sep 9, 2014

declare @user varchar(30) = ''
if(@user is not null or @user <> '')
print 'I am not empty'
print 'I am empty'

The output should be 'i am empty' but when i execute this i am getting ' i am not empty'. even i did browse through but i don't find the difference in my logic.

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SQL Server 2014 :: NULL And Empty Strings

Oct 29, 2015

I have always (or at least intended to) treat NULL and empty strings separately in my SQL querying history. Now I have run across something that mystifies me (but probably shouldn't) that I would like an explanation for.

Consider this bit o' code:

IF @ORDER <> ''
PRINT 'Not an empty string'


Run this and you will get:

It is NULL

I was expecting:

Not an empty string
It is NULL

Why is NULL not passing the 'not an empty string' test? In other words, how does NULL = '' ? Is NULL cast to an empty string for this comparison?

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Check For Null Or Empty Values And Return 0

Mar 13, 2014

I am using the below query to calculate column values. But I need to return zero when a column values is empty or null.

select [Funding] [Fundings],
[Original] AS [Originals],
[Variance] = SUM([Previous_Year]-[Current_Year]),
[SumValue] = SUM([CurrentYear]/4),
[ActualValue] = SUM([Variance] * 0.75),
[New Value] = SUM([Previous_Year]+[Current_Year])
from Finance
GROUP BY [Original], [FinanceYear]

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Parameter Value From Empty Text Box - Null Or 0 Length?

Jul 20, 2005

Hi,I run a stored procedure with a parameter given from a text box in an accessadp. If the text box is empty then what is passed to the parameter? I can'tseem to get it to flag up as either null, or 0 length.Any tips?Cheers,Chris

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How To Pull Null (empty) Records From SQL Database

Dec 5, 2007

How to pull null (empty) records from SQL database,

what query am I suppose to use to get result

help me

thank you

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Transact SQL :: How To Get Zero Or Null Value For Empty Results In Server

Oct 7, 2015

I have written one query like this 

select staffid,staffname,deptname

From staff s join dept d on s.deptid=d.deptid

This query we have no results 

I need this results

staffid staffname deptname
null     null          null

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Web Service Dataset With Null Or Empty Spaces.

Sep 6, 2007

I am using XmlDataDocuments returned by webservices and query in the reports to populate the reports.

The issue I have is if the dataset used to populate the XML document has any nulls or empty spaces in any field the whole column or row is missing in the data generated by my query in the Reports. Sometimes the whole data is not being returned to the reports.

Sample query I use

<Method Namespace="" Name="SelectReportRegisters">
<Parameter Name="p_registerType">
<Parameter Name="p_registerName">
<Parameter Name="p_asOfDate">

I have tested the webservice with sample data and it works well, returns data.

I use the ISNULL() in my stored procedures to avoid nulls but with empty strings, replacing them with a default value in the managed code is expensive and slows down the reports.
Is there some feature I am missing because of which nulls and empty strings are causing this problem.

I am using Reporting services 2005.

Any pointers will be truly appreciated.

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Detect And Convert An Empty String (from Textbox) To Null?

Jun 9, 2007

 Hi all,I have this code that I use for my Search function:SELECT DISTINCT [MUSIC_TITLE], [MUSIC_ORIGINAL_SINGER], [MUSIC_PERFORMER]FROM t_musicWHERE (@MUSIC_TITLE IS NULL OR [MUSIC_TITLE] LIKE '%' + @MUSIC_TITLE + '%') AND (@MUSIC_ARTIST IS NULL OR ([MUSIC_ORIGINAL_SINGER] LIKE '%' + @MUSIC_ARTIST + '%' OR [MUSIC_PERFORMER] LIKE '%' + @MUSIC_ARTIST + '%')) But right now if I don't enter anything in one of the textbox (2 have two, either of them can be left empty), the above Sql statement doesn't return anything since ADO.NET can't tell an empty textbox and treat it at null... So anyone please help me how to detect an empty textbox and set that to null for the above SQL statement to work. (It work in SQL Manager Studio, when I set one of the parameter = null.) I'm very new to ASP.NET stuffs, so if someone can help me to convert that function to code-behind and help me to call it from the .aspx, that would be even better as I don't want to put the code in my .aspx page... But I'm not quite there yet. Thank you all,Kenny.  

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How To Pass Null Value To The Database If A Form Field Is Empty?

May 31, 2004

How can I pass into the database (@User_fax = null) if the fax form field is empty, from a command type Stored Procedure? For example:

Dim CmdUpdate As New SqlCommand("Form2_NewUser", strConnection)
CmdUpdate.CommandType = CommandType.StoredProcedure

CmdUpdate.Parameters.Add("@User_fax", SqlDbType.char, 9)
CmdUpdate.Parameters("@User_fax").Value = fax.Text()


And, the stored procedure inside Sql server:

USE market1
ALTER PROC Form2_NewUser
@User_id bigint, @User_fax char(9),...


SET User_fax = @User_fax, ...

WHERE User_id = @User_id

Thank you,

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Mar 10, 2006

    I am using the following query to calculate date differences:select ..........DATEDIFF(d,  recruitment_advertising.advertising_date, career_details.RTS_Email AS Datetime) AS Ad_to_RTS_days FROM .....I have stored all my dates as NVARCHAR because of the issues with localization.If the value is an empty String my output is eg: -38700. which is way off and incorrect. Some of the values in my table are NULL and they produce the correct result.Is there a T-SQL statement to replace empy Strings with the NULL value in my tables.I'd like to use it as a trigger when inserting or updating to convert empty strings to NULLbefore the values are inserted.Thanks guys.

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Oracle Empty String == NULL Behavior In SQLServer 2k5?

Feb 15, 2007

I'd like to have Oracle's empty string behavior in SQLServer 2k5. Oracle treats an empty string as NULL's.

In PL/SQL can do:
... and it'd return rows containing NULL's as well as empty strings.

Can this be done? I couldn't find a setting for it.



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Inserting Empty Values Into NOT NULL Columns Via ODBC

Jul 20, 2005

We are writing a C application that is using ODBC to insert recordsinto a database. We have a NOT NULL column that can legitimately havean empty value, i.e. we know the value and it is empty (i.e. a zerolength string).We are using SQLBindParameter() to bind a variable to theparameterized insert statement <<in the form: INSERT INTO table VALUES(?, ?, ?)>>. We are using SQLExecDirect() to process the SQL.We are running into the problem where ODBC is converts the empty (zerolength) string into a NULL value and this errors due to the fact thatthe column is defined as NOT NULL.We do not want to redefine the column as NULL, becasue myunderstanding of the correct usage of a NULL column is to indicatethat a value is unknown or meaningless... in our case we know thevalue (it is empty) and an empty value has meaning within ourapplication.I'm sure that this issue has been seen and address thousands(millions?) of times... any guidance would be appreciated.

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When A Feild Is Null I Do Not Want To See The Empty Cell And Titel In A Report?

Mar 29, 2007

Let's say I have three fields in a table like this...


Tell us about cats

Tell us about dogs

Now I have two records.

Name Billy Bob

Tell us about cats I do not have any Cats

Tell us about dogs "null"

Name Joe Slick

Tell us about cats "null"

Tell us about dogs they sure chase Cats a lot.

I want my report to generate like this:

Name Billy Bob

Tell us about cats I do not have any cats

Name Joe Slick

Tell us about dogs they sure chase cats allot.

How do I omit null fields in a report including the field description? I am pretty flexible and I am willing to explore using ASP.Net, asp, html, VS2005 ? Or please tell me a program to use. I have a lot of reports to create. The data base is MS SQL 2005. The reports need to be published to the web. Can anyone suggest the best method?

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IS NULL Returns Empty Records (using TEXT Type)

Mar 3, 2008

Hi all I am having some issues in selecting items from my database where the record is NOT NULL. I have the code below however although some fields do contain soem data in it, others are blank which I believe are empty spaces. How do I do a SELECT command which ignores empty spaces and NULLS?

Code Snippet

SELECT CustomSearch FROM OfficesTable WHERE CustomSearch IS NOT NULL
Thanks, Onam.

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Setting Empty Text Box Input On Form To Null Parameter For Sql

Feb 19, 2007

 I'm pretty new to ASP.NET and VB, but I'm working on a project which is essentially a staff directory. Using VS 2005, I've setup a basic grid view which connects to an object which connects via a data layer to a SQL database with Name, Surname, Email, Extension No and Department fields.
I have it working so that if a user enters a name and surname for example, it will return all records with either the name matching or surname matching input parameters. What I want to do is to set up a SQL query which is:
 SELECT * FROM records WHERE (Name LIKE @Name) AND (Surname LIKE @Surname) AND (Email LIKE @Email) AND (Dept LIKE @Dept)
so that if the user only enters the first name and surname for example as above, it ONLY returns the record which matches the first name and surname and not all records with either/or. One way I've thought of to do this is to convert the empty fields to "Nothing" so that it fullfils the search parameter for the empty fields. If someone can explain how to do this, or can suggest a better way, I'd be grateful.

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Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?

Oct 27, 2004

i have a trigger on a table right now... when fields are inserted, theres a text field inserted and i want to check if that text field = '' (the empty string, not NULL) and if it doesn't equal that, then perform some row updates on other tables, but if it is empty, to not do anything else in the trigger... right now i have this:


IF ((SELECT Note FROM XATPoDetail WHERE ReqNbr = (SELECT ReqNbr FROM Inserted)) LIKE(''))

Note is the text field, XATPoDetail is the table where its being inserted into. I had to do the select FROM the table because it wouldn't let me select a text data type from the "Inserted" virtual table

but it tells me me "Error 279: The text, ntext, and image data types are invalid in this subquery or aggregate expression"


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