Difference Between NULL And Blank In SQL
Mar 1, 2006Hi,
My question is, is there any difference between a NULL and a Blank
(Unknown, Not Applicable) field in MS SQL or are they the same?
Awaiting your comments,
Regards
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Insert As NULL Not 0 Or Blank
Oct 18, 2007Does anyone know the trick when inserting an empty variable into a MSSQL table for it to show as null and not a blank or a zero?
It is a php variable.
Thanks
NULL Valvue Vs BLANK Value
Jun 3, 2008so far, i'd read a lot of books and search from internet, i still don't very understand the difference between of NULL and balnk value.
can anybody help to explain on it?
NULL/Blank Collation After DB Restore
May 7, 2004If a database's collation is blank under enterprise manager and NULL with SELECT DATABASEPROPERTYEX('<Database_Name>', 'Collation') does this mean it has the same collation as the server?
The reason I ask is that I restored a database with a different collation to my server and so I expected the different collation name to show up.
Its showing as blank though...
I thought databases kept their original collation even if restored to another server.
(The database was restored as a new database).
Set Input Parameter To Zero If Null Or Blank
Jan 8, 2015I am passing few parameters to the sql function to do some calculations. If the input parameter is null or blank, then I want to set the input parameter to the value zero
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Apr 17, 2008
Hi, where I return the address details, in some of the fields they are blank, I need these blank fields as nulls, how do i do that ?
Thanks
Code Snippet
SELECT
a.[Account Name],
a.[Line Address 1],
a.[Line Address 2],
a.[Line Address 3],
a.[Line Address 4], b.*
FROM (
SELECT
abCUSA AS Company,
abCUSB AS Account,
0 AS DeliverTo,
abcnam AS [Account Name],
abcad1 AS [Line Address 1],
abcad2 AS [Line Address 2],
abcad3 AS [Line Address 3],
abcad4 AS [Line Address 4],
CONVERT(VARCHAR(20), abCUSA) + CAST(abCUSB AS VARCHAR(20)) AS [Customer Number]
FROM
LIVEAS400.S65C422B.WRFDTA.PARNADR
) a
Inner JOIN
(
SELECT
SLDATE as Date,
SLCUSA as [Company Number],
SLCUSB as [Customer Suffix],
SLDELN as [Deliber To Number],
SLTREF as [Trans Reference],
SLCNAM as [Deliver To Name],
CONVERT(VARCHAR(20), SLCUSA) + CAST(SLCUSB AS VARCHAR(20)) AS [Customer Number],
CONVERT(VARCHAR(20), SLCUSA) + CAST(SLCUSB AS VARCHAR(20)) + CAST(SLDELN AS VARCHAR(20)) AS [Full Deliver To Number],
-- SLTRT2 as [Trans type],
CASE WHEN SLTRT2 IN (92, 93, 94, 95, 98) THEN SLGDSV * -1 ELSE SLGDSV END as [Goods Value],
CASE WHEN SLTRT2 IN (92, 93, 94, 95, 98) THEN SLVATV * -1 ELSE SLVATV END as [VAT],
CASE WHEN SLTRT2 IN (92, 93, 94, 95, 98) THEN SLTOTV * -1 ELSE SLTOTV END as Total,
SLDESC as [Trans Description]
FROM LIVEAS400.S65C422B.WRFDTA.SQLSLDGR
) b ON a.[Customer Number] = b.[Customer Number]
Entering Null Into Blank Fields In The Database
May 1, 2005How can I enter NULL manually in one of the rows in Sql Server database. Those rows does not contain any data.
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Oct 29, 2007
I have created a report with a stored proc which takes a parameter whose default value is null. Now when I run my stored proc in Enterprise Manager without any params I get 4 rows otherwise with proper parameter I get 2 rows.
Now I set the params value to allow for Null and blank values. When I run the report if I provide parameter value it works fine but if i try to run it without any param it shows an empty report while the stored proc running without params shows 4 rows.
I have earlier sucessfully created reports where stored procs had 4 params out of which 3 where defaulted to null. And so I set the allow nulls, Allow Blanks values to be true for those params in Rep services. So when I selected value for 1st param and ran the report I got the desired report. But this time I have only one param which can be null. But its not working.
Thanks in advance.
Insert Previous Record In A Blank Or A Null Field
Nov 29, 2000Data from as400 imports into SQL with blank fields which is the way as400 outputs records. How can you insert previous record of data null or blank field. ex:
ONETWO
a1
2
3
b1
2
3
Would want:
ONETWO
a1
a2
a3
b1
b2
b3
Capture Null/blank Values In An Update Statement
Sep 13, 2007I have built a SSIS package that bascially updates two columns in table A...the update statement reads;
update Table A
set Colum 1 = ?,('?' is a variable)
Column 2 = ?
In my SSIS package, I would like to be notified/capture, if one or both variables are null....How do I do that ?..error log ?
The package runs fine both ways (if variables are null or not)
Thank you
Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?
Oct 27, 2004i 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:
Code:
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"
thanks
Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?
Oct 27, 2004i 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"
thanks
SQL Parameter Update Not Updating Changed Null/blank Values
Oct 24, 2006I am attempting to update a sql db using the update and parameter code in VB.net 2003 through MSDE for a web application. It updates changed data OK, but if the textbox value is deleted, the code does not update the sql db. I am new to this, and I'm sure it is something simple. Here is some sample code.
SqlConnection1.Open()
strSQLu = "UPDATE table1 " _
& "SET Field1Tag = @Field1Tag, Field2Tag = @Field2Tag " _
& "WHERE (Field1Tag = @Field1Tag) "
cmdCategoriesUpdate.CommandText = strSQLu
With cmdCategoriesUpdate
.Parameters("@Field1Tag").Value = txtFld1.Text
.Parameters("@Field2Tag").Value = txtFld2.Text
End With
cmdCategoriesUpdate.ExecuteNonQuery()
SqlConnection1.Close()
Difference Between '' And Null
Oct 17, 2006Hi
It may sound like a stupid question...
Is there a difference between '' and null?
Default To NULL Instead Of Blank/empty String During Flat File Import
Aug 15, 2006Hi,
In SSIS flat file import using fastload, I'm trying to import data into SQL 2005 previously created tables.
The table may contain column that are NULLable BUT there is NO DEFAULT for them.
If the incoming data from flat files contains nothing either between the delimeters, how can I have a NULL value inserted in the column instead of blank/empty string?
I didn't find an easy flag unless I'm doing something wrong. I know of at least two ways to do it the hard way:
1- set the DEFAULT(NULL) for EVERY column that needs this behaviour
2-set up some Derived Column option in the package to return NULL if the value is missing.
Both of the above are time consuming since I'm dealing with many tables. Is there a quick option to default the value to NULL WHEN there is NO data ELSE insert the data itself? So the same behavior that I have right now except that I want NULL in place of empty string/blank in the varchar(x) columns.
Thanks
Anatole
What Is Th Difference Between Is Null & COALESCE
Feb 4, 2008WHATS the basic diff. between Is Null and Coalesce can someone help me regarding this
Rahul Arora
07 Batch
NCCE Israna,
######################
IMPOSSIBLE = I+M+POSSIBLE
Integration Services :: Replace Blank Strings Values To NULL And Convert To Integer Data Type
Oct 5, 2015I need to convert a a string column to integer. Before converting, I need to check if it has blank values then convert it to NULL. Someone told me that its easier to convert it to NULL before converting to integer.
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Aug 29, 2007Hi,
What is the difference updating a null value to char/varchar type column
versus empty string to char/varchar type column?Which is the best to do and why?
Could anyone explain about this?
Example:
Table 1 : tCountry - Name varchar(80) nullable
Table 2 :tState - Name char(2) nullable
Table 3 :tCountryDetails - countryid,state (char(2) nullable) - May the country contain state or no state
So,when the state is not present for the country ,i have two options may be - null,''
tCountryDetails.State = '' or tCountryDetails.State = null?
Pass In Null/blank Value In The Date Field Or Declare The Field As String And Convert
Dec 30, 2003I need to pass in null/blank value in the date field or declare the field as string and convert date back to string.
I tried the 2nd option but I am having trouble converting the two digits of the recordset (rs_get_msp_info(2), 1, 2))) into a four digit yr. But it will only the yr in two digits.
The mfg_start_date is delcared as a string variable
mfg_start_date = CStr(CDate(Mid(rs_get_msp_info(2), 3, 2) & "/" & Mid(rs_get_msp_info(2), 5, 2) & "/" & Mid(rs_get_msp_info(2), 1, 2)))
option 1
I will have to declare the mfg_start_date as date but I need to send in a blank value for this variable in the stored procedure. It won't accept a null or blank value.
With refresh_shipping_sched
.ActiveConnection = CurrentProject.Connection
.CommandText = "spRefresh_shipping_sched"
.CommandType = adCmdStoredProc
.Parameters.Append .CreateParameter("ret_val", adInteger, adParamReturnValue)
.Parameters.Append .CreateParameter("@option", adInteger, adParamInput, 4, update_option)
.Parameters.Append .CreateParameter("@mfg_ord_num", adChar, adParamInput, mfg_ord_num_length, "")
.Parameters.Append .CreateParameter("@mfg_start_date", adChar, adParamInput, 10, "")
Set rs_refresh_shipping_sched = .Execute
End
Please help
SQL Server 2008 :: Non Blank / Non Null Value From Table To Update Same Table
Mar 13, 2015Here is the sample data for table.
create table #sample (emp varchar(max),data1 varchar(max),data2 varchar(max), Rdate date)
insert into #sample (emp,data1,data2,rdate)
values('john','','',getdate())
insert into #sample (emp,data1,data2,rdate)
values('tony','','',getdate())
[Code] ...
I need to update the data1, data2 from yesterday or before but they should be non blank and non null and update to todays data.
It means, I can't update to 2015-03-12 values to 2015-03-13, as they are blanks or nulls.
So I need to go 2015-03-11 and check the values, if they are not blank , i need to update with todays values.
Before the update :
empdata1data2Rdate
john3/13/2015
tony3/13/2015
john3/12/2015
tony3/12/2015
johncd3/11/2015
tonyab3/11/2015
After the update:
empdata1data2Rdate
johncd3/13/2015
tonyab3/13/2015
john3/12/2015
tony3/12/2015
johncd3/11/2015
tonyab3/11/2015
Integration Services :: Excel Column Turns To Blank / NULL While Import Using SSIS Excel Source 2008
Jul 6, 2015While importing data from Excel source , some column is getting null value even though excel column has value.To Resolve the issue we tried with
HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftOffice14.0Access Connectivity EngineEnginesExcel
1.Change the Value of the Row TypeGuessRows from 8 (Default value) to 0 and ImportMixedType = text
• xls
HKEY_LOCAL_MACHINESOFTWAREMicrosoftJet4.0EnginesExcel
1.Change the Value of the Row TypeGuessRows from 8 (Default value) to 0 and ImportMixedType = text
the connection string of the excel
UPPER(REVERSE(SUBSTRING( REVERSE(@[User::VarInputExcelFile]), 1, 5) ) ) == ".XLSX" ? "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + @[User::VarInputExcelFile] + ";Extended Properties="Excel 12.0;HDR=Yes;IMEX=1";":"Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=" + @[User::VarInputExcelFile] + ";Extended Properties="EXCEL 8.0;HDR=Yes;IMEX=1";"
by doing the above setting also , the column is coming as null from excel source even though there is data in excel.
Help Needed Convert A Blank In Char To Blank In Float
Apr 29, 2008Hi,
I receive blanks for a column called value and i need to represent it as a blank or NA into a colum whose datatype is float in the datawarehouse.
how is this possible because in current schenario a blank is being converted to 0
which is not the right thing.
i would like to retain the blank in conversion from char to float ,
please explain me if it can be done or how to overcome this issue.
Thanks
Can Anyone Give Me A Layman's Explanation Of The Difference Between CURRENT_TIMESTAMP And GETDATE() (if There Is A Difference)?
Oct 24, 2007Question is in the subject.
Thanks in advance
-Jamie
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Sep 20, 2006Hey. 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
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Oct 20, 2015In 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?
Integration Services :: SSIS Insert Non Null Value Into Null Rows
Jul 15, 2015I 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.
Subscription Issue With Null Default Parameter - Key Cannot Be Null
May 3, 2007I have a report that is run on a monthly basis with a default date of null. The stored procedure determines the month-end date that it should use should it be sent a null date.
The report works fine when I tell it to create a history entry; however, when I try to add a subscription it doesn't appear to like the null parameter value. Since I have told the report to have a default value of null it doesn't allow me to enter a value on the subscription page.
Now, I suppose I could remove the parameter altogether from the stored proc, but then the users would never be able to run the report for a previous time period. Can someone explain to me why default values aren't allowed to be used on subscriptions when they seem to work fine for ad hoc and scheduled reports? This is really quite frustrating as most of my reports require a date value and default to null so that the user doesn't have to enter them for the latest data.
An internal error occurred on the report server. See the error log for more details. (rsInternalError) Get Online Help
Key cannot be null. Parameter name: key
Returned SQLParam.SqlValue Is {Null} But Can't Test For Null?
Nov 5, 2007I run a stored procedure for which I have a return variable. The stored procedure returns the ID of a row in a table if it exists:
m_sqlCmd.ExecuteScalar();
The m_sqlCmd has been fed an SQLParameter with direction set to output.
When the stored proc returns, I want to test it. Now when there IS a row it returns the ID ok.
When the row doesn't exist, in my watch I have:
m_sqlParam.SqlValue with value {Null}
I can't seem to work out how to test this value out.
I've tried several things but none seem to work.
This line compiles ok, but the following runs into the IF statement as if the SqlValue is null??
if (m_sqlParam.SqlValue != null)....
{
// I'm here!! I thought the watch says this is null???
}
Sorry if this is obvious, but I can't work this one out!!
Any Improvements To This: Cannot Apply Value Null To Property Login: Value Cannot Be Null.
Mar 26, 2007Looks like there was a fix and then I read this fix is not a fix. Does anyone know how this can be rectified? Does it mean that only Windows authentiation is the only way it works. The Software is over 2 years old, there are no excuses.
Cannot Insert The Value NULL Into Column 'OrderID' -- BUT IT IS NOT NULL!
Apr 2, 2007I am getting this error: "Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails." -- But my value is not null. I did a response.write on it and it show the value. Of course, it would be nice if I could do a breakpoint but that doesn't seem to be working. I'll attach a couple of images below of my code, the error, and the breakpoint error.
Server Error in '/' Application.
Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.Source Error:
Line 89: sContact.Phone = sPhone.Text.Trim
Line 90: sContact.Email = sEmail.Text.Trim
Line 91: sContact.Save()
Line 92:
Line 93: Dim bContact As Contact = New Contact()Source File: F:InetpubwwwrootOutman KnifeCheckout.aspx.vb Line: 91 Stack Trace:
[SqlException (0x80131904): Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +857354
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734966
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1838
System.Data.SqlClient.SqlDataReader.HasMoreRows() +150
System.Data.SqlClient.SqlDataReader.ReadInternal(Boolean setTimeout) +214
System.Data.SqlClient.SqlDataReader.Read() +9
System.Data.SqlClient.SqlCommand.CompleteExecuteScalar(SqlDataReader ds, Boolean returnSqlValue) +39
System.Data.SqlClient.SqlCommand.ExecuteScalar() +148
SubSonic.SqlDataProvider.ExecuteScalar(QueryCommand qry) +209
SubSonic.DataService.ExecuteScalar(QueryCommand cmd) +37
SubSonic.ActiveRecord`1.Save(String userName) +120
SubSonic.ActiveRecord`1.Save() +31
Checkout.btnCheckout_Click(Object sender, EventArgs e) in F:InetpubwwwrootOutman KnifeCheckout.aspx.vb:91
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
Help Altering Database Table From NULL To NOT NULL
Jun 28, 2004I 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 RelatedSp_option... 'concat Null Yields Null'
Feb 26, 2004I'm trying to set the concat... option to OFF
all the time and in all my databases
I tried this command
USE master
EXEC sp_dboption 'DatabaseName', 'concat null yields null', 'FALSE'
but it doesn't change anything
Select NULL + 'TOTO'
----> NULL
(it should be 'TOTO')
Change Not Null To Null, Default Value To Empty
Aug 3, 2005hi,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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