Efficiency In Inserting Null Values Into Fields Which Allow Nulls.

Aug 9, 2004

Hi,


I have fields in my table which allow nulls. Is it efficient to not insert anything (the field automatically shows up as null in this case) and leave or store some value into it. The field is a smallint field?





Thanks

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Inserting NULL Values On Date Fields Trhough DAL

Jul 25, 2006

I am using a DAL and i want to insert a new row where one of the columns is DATE and it can be 'NULL'.
I am assigning SqlTypes.SqlDateTime.Null.
But when the date is saved in the database, i get the minvalue (1/01/1900) . Is there a way to put the NULL value in the database using DAL????how can i put an empty date in the database?
THANK YOU!!!

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T-SQL (SS2K8) :: Inserting Multiple Records Each Containing Null Value For One Of Fields

Apr 11, 2014

I'm trying to insert multiple records, each containing a null value for one of the fields, but not having much luck. This is the code I'm using:

Use InternationalTrade
Go
CREATE TABLE dbo.ACCTING_ADJUST
(
stlmnt_instr_id varchar(20) null,
instr_id varchar(20) not null,

[Code] ....

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Inserting Null Values

May 11, 2004

Hi,

I am trying to insert null values into sql server from my access from. I am using sql statement. But it says 'Syntex error in Insert statement'. When i remove null values it works fine? How can I insert null values into a table?

Any help will be highly appreciated.

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Dec 14, 2000

Hi,

We are using an SQL Server database and seem to be having some problems with inserting null values into numeric fields. The field is set to accept nulls, but when we try and write a record into the database and that field is null, the application craps out on us. Are there any issues that we should be aware of when inserting null values into numeric fields? What might the problem be? Thanks.

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SQLXMLBULKLOAD Not Inserting Null Values

May 3, 2006

i have attached XML and XSD file
i bulkload xml file into 2 tables .ManifestID is the Relationship between 2 tables

CREATE TABLE [dbo].[BIOS_DataLoader_LDR_Manifest_Detail] (
[manifest_id] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[order_num] [bigint] NULL ,
[track_code] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[box_id] [varchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[box_type] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[scan_time] [datetime] NULL ,
[scac_code] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
) ON [PRIMARY]
GO

CREATE TABLE [dbo].[BIOS_DataLoader_LDR_Manifest_Header] (
[trailer_id] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[trailer_close_date] [datetime] NULL ,
[manifest_id] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[manifest_qty] [int] NULL ,
[origin_facility] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[destination_facility] [varchar] (20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
) ON [PRIMARY]
GO

When the first TrackCodeid is NULL
all remaining NULL TrackCodeid is entered as null in the database table
but if the first/prev trackcodeID is not NULL then following null trackCODEID is populated with the prev trackcodeID and not as null in database
<TrackCodeId>ABCDEFG</TrackCodeId>
All Null TrackCOdeID is populated as ABCDEFG
if we remove ABCDEFG and then bulkload all null values are populated
if a null trackCODEID is to be inserted the prev trackCODEID must be null and must not contain any value

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Inserting Null Values Into Smalldatetime

Feb 14, 2004

hi

how can we insert null into a small datetime field (from client application VB)

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Null Values In Calculated Fields

May 22, 2008



Hi all

I have a calculated fields in report designer such as a + b + c + d. In sql server if I run this query

select a + b + c + d from table1

and any of a,b,c or d is null, the result is null.

whereas in calculated fields, it does not return null but infact ignores the null value and treats it as zero.

I want my calculated field to be null if any of the values are null.
Is it possible? I cannot use the isNothing function because I have too many fields and it will be quite cumbersome.

Thanks

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Concatenating Fields With NULL Values

Jul 11, 2006

Hey everyone,

This is probably a very simple question, but I am just stumped. I am storing different name parts in different fields, but I need to create a view that will pull all of those fields together for reports, dropdowns, etc.

Here is my current SELECT statement:

SELECT m.FName + SPACE(1) + m.MName + SPACE(1) + m.LName + ', ' + m.Credentials AS Name,
m.JobTitle,
m.Company,
m.Department,
m.Address,
m.City + ', ' + m.State + ' ' + m.Zipcode AS CSZ,
m.WorkPhone,
m.FAX,
m.Email,
c.Chapter,
m.Active,
s.Sector,
i.Industry
FROM tblMembers m
LEFT OUTER JOIN tblChapters c
ON m.ChapterID = c.ChapterID
LEFT OUTER JOIN tblSectors s
ON m.SectorID = s.SectorID
LEFT OUTER JOIN tblIndustries i
ON m.IndustryID = i.IndustryID
WHERE m.DRGInclude = 1

My problem is that I don't know how to test for NULL values in a field. When you concatenate fields that contain NULL values, the entire contactenated field returns NULL. I am not aware of an IF statement that is available within the SELECT statement.

The first thing I would like to accomplish is to test to see if MName contains NULL. If it does I do not want to include + SPACE(1) + m.MName in the clause. Then, if Credentials contains NULL I do not want to include + ', ' + m.Credentials in the clause.

Can someone tell me what I am missing? Is there a function that I can use for this?

Thanks,

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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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Jul 20, 2005

HiI need some help on achieving the following:I wrote a querie which collects Data out of three Tables, the Resultlooks like this:SET NOCOUNT ONDECLARE @ROWINTDECLARE @CURPTNO CURSORSET @CURPTNO = CURSORFORSELECT * FROM TEMPOPEN @CURPTNOFETCH NEXT FROM @CURPTNOINTO @ROWWHILE (@@FETCH_STATUS = 0)BEGINSELECT ONE.CYNO, ONE.ROLE, ONE.ROL_BEZ, ONE.PTNO, ONE.NOCY, TWO.TEXTAS NOCY_TEXTFROM(SELECT CY.CYNO,RE.CYNO AS RECYNO, RTRIM(RE.ROLE) AS ROLE, RTRIM(V_ROLE.TEXT) ASROL_BEZ,RE.PTNO AS PTNO, RTRIM(RE.NAME) AS SACHBEARBEITER, RE.NOCYFROM CYRIGHT OUTER JOINRE ON RE.CYNO = CY.CYNOINNER JOINV_ROLE ON RE.ROLE = V_ROLE.CODEWHERE (RE.PTNO IN(SELECT PT.PTNOFROM PTWHERE PT.PTNO IN(@ROW)AND V_ROLE.LANGUAGE = PT.CLANG))) AS ONELEFT JOIN(SELECT V_NOCY.CODE, V_NOCY.TEXTFROM V_NOCYINNER JOINPT ON PT.CLANG = V_NOCY.LANGUAGEAND PT.PTNO IN (SELECT PT.PTNOFROM PTWHERE PT.PTNO IN(@ROW))) AS TWOON ONE.NOCY = TWO.CODEFETCH NEXT FROM @CURPTNOINTO @ROWENDCLOSE @CURPTNODEALLOCATE @CURPTNOThe Result looks like this:RS1:6313,1300,Architekt,99737505,NULL,NULL2392762,100,Bauherr,99737505,NULL,NULLRS2:2693265,100,Bauherr,99756900,NULL,NULLNULL,1,Planer,99756900,2,Bauherr macht Pläne selberRS3:2691919,100,Bauherr,99755058,NULL,NULL2691962,6000,Kontakt,99755058,NULL,NULLMy Problem is, that I need to have all the Resultsets in one Table atthe end.So my further undertaking was to create a Temp Table with theexpectation to receive all the resultsets in one Step.The TSQL for this looks like that:SET NOCOUNT ONCREATE TABLE #CYRE_TEMP(CYNOINT NULL,ROLEINT NULL,ROL_BEZVARCHAR (60) NULL,PTNOINT NULL ,NOCYINT NULL,TEXTVARCHAR (60) NULL)GODECLARE @CYNOINT,@ROLEINT,@ROL_BEZVARCHAR (60),@PTNOINT,@NOCYINT,@TEXTVARCHAR (60),@ROWINT,@CURPTNOCURSORSET @CURPTNO = CURSOR FORSELECT PTNO FROM TEMPOPEN @CURPTNOFETCH NEXT FROM @CURPTNOINTO @ROWWHILE (@@FETCH_STATUS = 0)BEGININSERT INTO #CYRE_TEMP (CYNO, ROLE, ROL_BEZ, PTNO, NOCY, TEXT)VALUES(@CYNO,@ROLE ,@ROL_BEZ ,@PTNO ,@NOCY ,@TEXT)SELECT @CYNO = ONE.CYNO,@ROLE = ONE.ROLE,@ROL_BEZ = ONE.ROL_BEZ,@PTNO = ONE.PTNO,@NOCY = ONE.NOCY,@TEXT = TWO.TEXTFROM(SELECT CY.CYNO, RTRIM(RE.ROLE) AS ROLE, RTRIM(V_ROLE.TEXT) ASROL_BEZ,RE.PTNO AS PTNO, RTRIM(RE.NAME) AS SACHBEARBEITER, RE.NOCYFROM CYRIGHT OUTER JOINRE ON RE.CYNO = CY.CYNOINNER JOINV_ROLE ON RE.ROLE = V_ROLE.CODEWHERE (RE.PTNO IN(SELECT PT.PTNOFROM PTWHERE PT.PTNO =@ROWAND V_ROLE.LANGUAGE = PT.CLANG))) AS ONELEFT JOIN(SELECT V_NOCY.CODE, V_NOCY.TEXTFROM V_NOCYINNER JOINPT ON PT.CLANG = V_NOCY.LANGUAGEAND PT.PTNO IN (SELECT PT.PTNOFROM PTWHERE PT.PTNO =@ROW)) AS TWOON ONE.NOCY = TWO.CODEFETCH NEXT FROM @CURPTNOINTO @ROWENDCLOSE @CURPTNODEALLOCATE @CURPTNOSELECT * FROM #CYRE_TEMPDROP TABLE #CYRE_TEMPGOAnd the Output looks like this now:Q1:NULL,NULL,NULL,NULL,NULL,NULL2392762,100,Bauherr,99737505,NULL,NULLNULL,1,Planer,99756900,2,Bauherr macht Pläne selberCan someone help me getting all the 6 Rows into one Table as Output?I appreciate any available Help on this..Ssscha

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Null Values In Datetime Fields, Howto?

Jul 12, 1999

Hi,
When I try to insert a new record into a table that has a datetime field that allows nulls, a default 01/01/1900 date is inserted instead of null. I recreated the table and set the datatype to smalldatetime and I still get the error. What have I missed?

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Insert NULL Values To Foreign Key Fields

Jan 15, 2008

Hi all,

I have a projects table with 2 foreign key fields that both link to the same employees table because a project has a Package Engineer (PkgEngineerID) and a Contract Administrator (PkgContrAdmin). When I try to insert a record with null values for either or both of these foreign keys I get an error:

The data in row xxx was not commited. The record can't be added or changed. Referential integrity rules require a related record in table 'tblEmployees'. The transaction ended in the trigger. The batch has been aborted.

An insert statement for the above would look something like the following:

INSERT INTO tblPackages (PkgNo, PkgName, PkgEngineerID, PkgContrAdmin, PkgRemark)VALUES (1234, 'My Package', NULL, NULL, 'My Package remark')

And the create table statements are:

USE [PASSQL]GO/****** Object: Table [dbo].[tblPackages] Script Date: 01/15/2008 23:25:26 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE TABLE [dbo].[tblPackages]( [ID] [int] IDENTITY(1,1) NOT NULL, [PkgNo] [nvarchar](20) NULL, [PkgName] [nvarchar](255) NULL, [PkgEngineerID] [int] NULL, [PkgContrAdmin] [int] NULL, [PkgRemark] [nvarchar](255) NULL, [upsize_ts] [timestamp] NULL, CONSTRAINT [aaaaatblPackages_PK] PRIMARY KEY NONCLUSTERED ( [ID] ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]GOALTER TABLE [dbo].[tblPackages] WITH NOCHECK ADD CONSTRAINT [FK_tblPackages_tblEmployees] FOREIGN KEY([PkgEngineerID])REFERENCES [dbo].[tblEmployees] ([ID])GOALTER TABLE [dbo].[tblPackages] CHECK CONSTRAINT [FK_tblPackages_tblEmployees]GOALTER TABLE [dbo].[tblPackages] WITH NOCHECK ADD CONSTRAINT [FK_tblPackages_tblEmployees1] FOREIGN KEY([PkgContrAdmin])REFERENCES [dbo].[tblEmployees] ([ID])GOALTER TABLE [dbo].[tblPackages] CHECK CONSTRAINT [FK_tblPackages_tblEmployees1]

And:

USE [PASSQL]GO/****** Object: Table [dbo].[tblEmployees] Script Date: 01/15/2008 23:28:01 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE TABLE [dbo].[tblEmployees]( [ID] [int] IDENTITY(1,1) NOT NULL, [EmpName] [nvarchar](255) NULL, [EmpShort] [nvarchar](255) NULL, [upsize_ts] [timestamp] NULL, CONSTRAINT [aaaaatblEmployees_PK] PRIMARY KEY NONCLUSTERED ( [ID] ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]
Any ideas on how to accomplish this would be great!
Thanks in advance!

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Sep 4, 2007

Hi, i'm new to SSIS and trying to import some csv files (comma delimited) into SQL Server. A NULL value for a CHAR column is correctly regonized as NULl in SQL Server, but a NULL value for of a mapping to a VARCHAR column in SQL Server is not recognized correctly and i get the value "'NULL'" in SQL Server (including the single comma.

Sample:

CSV file contains columns A and B. A and B contains the Text NULL.
Column A is mapped to a CHAR field, and column B is mapped to a VARCHAR field in SQL Server.
After the import, SQL has the following value: A = NULL as NULL, B 'NULL' as text.

did anyone else had this problem?

thanks so much for any help.

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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;
}
else
{
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.

Thanks,

-Tony

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Jan 25, 2008

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-- Ryan

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Hi,

I've forgotten how to put a null value in a column of a table where a previous value existed before.

What I mean is if through EM, you look at the data (Open Table -> Return all Rows) and you see a value in a column that is nullable (for example, I want to change a column that has a 'ABC Company' to a NULL value).

How do you that - i've done it in the past ,but cannot remember

Thanks in advance

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Mar 27, 2002

I'm using ADO.NET and have noticed that it is somewhat more difficult to send/receive nulls to/from the database. What are the benefits (if any exist) with storing a null value in the db as opposed to a default value?

In particular, do you save any space by storing a null opposed to a zero or 01/01/1900? Are the nulls faster for searching/comparing when querying the db?
Basically I'm just wondering if storing nulls is really the best practice and why, so that I know whether it's worth the effort in .NET to transform my variables into a null-happy form.

Any facts/opinions are appreciated,
Inge

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Jan 16, 2004

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Sep 25, 2007

How can I do this in SSIS. Any suggestion please


Insert Into Table1(T1_Col1, T1_Col2)

Select T2_Col1,Isnull( T2_Col2,' ') From Table2


I want to insert from Table 2 into Table1. If the data in T2_Col2 is NULL than I want to replace it with a blank/ Space as Table1 doesnot allow NULLS

I tried to see if Derived Column task is of any help but in vain.

Any suggestion

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Mar 3, 2008

I'm trying to insert any null values into a temp table. I'm storing the ixo_rlt_code as OldRole, and 'Other' as NewRole. I need both the ixo_rlt_code as OldRole and 'Other' as NewRole in the temp talbe in order to run an update I'm writing.

I know a case statement isn't necessary here, but this section is only one small part of a larger script, so I just used it to be consistent, and it will be easier to make any future changes this way. Below is my code and the error message I'm getting...


select
ixo_key,
ixo_title as Title,
ixo_rlt_code as OldRole,
CASEWHEN ixo_title is null
or ixo_title = ''
or ixo_title = ' '
or ixo_title = ' ' THEN 'Other'

END as NewRole


from
co_customer (nolock)
join co_individual_x_organization (nolock) on ixo_key = cst_ixo_key --and ixo_delete_flag = 0
where
cst_delete_flag = 0
and cst_type = 'Individual'
and ixo_rlt_code is null


This is the Error Message I get:
Server: Msg 515, Level 16, State 2, Line 1095
Cannot insert the value NULL into column 'NewRole', table 'tempdb.dbo.#temp_______________________________________________________________________________________________________________00000001698C'; column does not allow nulls. INSERT fails.
The statement has been terminated.


Thanks ahead of time for any help/suggestions

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Jan 9, 2008

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Cannot insert the value NULL into column 'TNV-INSERT1'


"

Here's the expression I'm using:
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Neither of the source columns contain nulls. Any idea why it's trying to insert nulls into the new column?

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Nov 1, 2007

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E.G

COL 1 COL 2 COL 3 COL 4 TOTALSTOCK

2 NULL 0 1 NULL

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Is there a way to do an update to change NULL's to 0?

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Sep 26, 2013

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Here's the sql:

USE [aren]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [aren1002].[ArenAlertInsert]

[Code] ....

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Jan 15, 2007

Hi,I basically have two tables with the same structure. One is an archiveof the other (backup). I want to essentially insert the data in to theother.I use:INSERT INTO table ( column, column .... )SELECT * FROM table2Now, table2 has a rule on various columns:@CHARACTER IN ('Y','N')but the column allows nulls, in the design view is says so anyway.When I run this query I get:A column insert or update conflicts with a rule imposed by a previousCREATE RULE statement. The statement was terminated. The conflictoccurred in database 'database', table 'table', column 'column'.The statement has been terminated.Obviously, I've changed the names of everything.The only data in those columns which could possibly conflict with therule is the NULL value. Any ideas why this doesn't work?Thanks.

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Aug 3, 2000

I have a select statement which has to convert some date fields stored
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will return data show below but gives me an error message when it encounters
any data with null in the field. Is there something wrong in my conversion?
Thanks


declare @tdate varchar(10)
declare @rldate datetime
select @tdate = 20000630
select @rldate = @rldate + 2
select patient_.df_admit_date, patient_.df_ppdb_date from patient_
where (convert(datetime, df_ppdb_date, 101)+ 12) >= @tdate or
(convert(datetime, df_admit_date, 101) + 2 ) >= @tdate

19980910 20000626
19981215 20000627
19590114 20000621
20000629 NULL
20000706 NULL
20000711 NULL

(6 row(s) affected)

Server: Msg 242, Level 16, State 3, Line 5
The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.

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-- DECLARE @var1 varchar(10) = 'alpha1', @var2 varchar(10) = 'bravo2', @var3 varchar(10) = 'charlie3',@var4 varchar(10) = 'delta4'
DECLARE @var1 varchar(10) = 'alpha1', @var2 varchar(10) = NULL, @var3 varchar(10) = 'charlie3',@var4 varchar(10) = 'delta4'

SELECT ss= (CONCAT(@var1, + iif(COALESCE(@var1,@var2,@var3,@var4) IS NULL,'',', '),
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Jun 22, 2008

Hi Guys,

I have a resulset in this manner.

id----- amt
----------- -----------
1----- NULL
2----- 20
3----- 20
4----- 20
8----- NULL
9----- 30
10----- 120
11----- 110
21----- NULL
22----- 110

Furthermore I would like to sum the minimum amt & maximum amt between two Null values.So ideally the output should be

minid maxid amt
2----- 4----- 40
9----- 11----- 140
21---- NULL----- 110

Thanks for any help.

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Nov 16, 2007



I have a table containing a VARCHAR(9) NOT NULL column. Every record in the column will have alength of 9 if a record exists.

WHEN I run the following query on the table

SELECT Column_A
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I get no records returned. However, I know that when I run a query

SELECT DATALENGTH(Column_A)
FROM table1
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I have used Datalength instead of LEN because LEN does not return the length of a space character.

I get records amny records. When I copy an individual record from the column, it shows that a space character is in the record.

Does anyone know whay this is happening?


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Sep 25, 2015

I have been away from SQL for a couple of months, and for the life of me cannot work out a simple way to do what i want to do.

select bu1.name,bu2.name, bu3.name, bu4.name, bu5.name
from
Sale
INNER JOIN
Sysuser on sale.userid = sysuser.userid
INNER JOIN businessunitBU1
on BU1.Businessunitid = sysuser.businessunitid
left JOIN businessunitBU2
on BU2.Businessunitid = bu1.parentbusinessunitid
left JOIN businessunitBU3
on BU3.Businessunitid = bu2.parentbusinessunitid
left JOIN businessunitBU4
on BU4.Businessunitid = bu3.parentbusinessunitid
left JOIN businessunitBU5
on BU5.Businessunitid = bu4.parentbusinessunitid

So effectively i am trying to go through the hierarchy to find all the levels. Unforunately not every entry has the same amount of levels.

So its coming out like this.....

Bu1 BU2 BU3 BU4 BU5
L5 L4 L3 L2 L1
L4 L3 L2 L1
L3 L2 L1
L5 L4 L3 L2 L1

So whats the easiest way to move everything along to fill in the blanks, but move the blanks to the end - so it would be more like this:

Bu1 BU2 BU3 BU4 BU5
L5 L4 L3 L2 L1
L4 L3 L2 L1
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Nulls In Columns Additions When 1 Or More Column Values Is Blank

Jun 4, 2007

I am running into an issue when adding data from multiple columns intoone alias:P.ADDR1 + ' - ' + P.CITY + ',' + ' ' + P.STATE AS LOCATIONIf one of the 3 values is blank, the value LOCATION becomes NULL. Howcan I inlcude any of the 3 values without LOCATION becoming NULL?Example, if ADDR1 and CITY have values but STATE is blank, I get aNULL statement for LOCATION. I still want it to show ADDR1 and CITYeven if STATE is blank.Thanks

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