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?
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!!!
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?
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.
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
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.
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?
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.
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
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?
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:
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.
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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?
I have a pivot transform that pivots a batch type. After the pivot, each batch type has its own row with null values for the other batch types that were pivoted. I want to group two fields and max() the remaining batch types so that the multiple rows are displayed on one row. I tried using the aggregate transform, but since the batch type field is a string, the max() function fails in the package. Is there another transform or can I use the aggragate transform another way so that the max() will work on a string?
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
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.
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.
I currently have 5 fields in the same SQL Server table, 4 of which pull Stock Levels from other tables and the 5th is a Total Stock field which is to add the 4 previous fields.
The problem is that some of the first 4 fields contain nulls as well as figures and when the Total Stock trys to add these together the outcome is Null, which is incorrect.
E.G
COL 1 COL 2 COL 3 COL 4 TOTALSTOCK
2 NULL 0 1 NULL
I have tried to change it to a NOT NULL Column but won't let me.
Is there a way to do an update to change NULL's to 0?
I'm inserting data from a c# webservice into a table via a stored procedure, but I get a Column does not allow nulls on the @alert_id column/field. It is set as int and allow nulls is not ticked.
Here's the sql:
USE [aren] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [aren1002].[ArenAlertInsert]
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.
When I include a field from my SQL Server database, which has it's Allow Nulls value checked, in the data source of any type of control with it's Enable Editing property check, I then can not edit the record! If I remove the Allow Nulls field I can then edit it! What am I missing here?
I have a select statement which has to convert some date fields stored as varchar based on critera of adding numbers to the date. What I have below 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
In OO programming, data references, such as pointers in C++ or objects in C#. If the reference is null, it points to no object, or to 0x000000, thus the "referenced" object is non existent and the "object" takes up no RAM.
I know pointers are not the same as Database values, but what I'm interested in knowing is, on the bits and bytes level, what is a "NULL" and how much space does it take up, as much as is the field? Or just one byte? and when a NULL is replaced does that cause a shifting in the data of the database page or does the new data simply replace the null?
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.
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